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How to check equation pdf

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welcome to friendly math 101 today our lesson is on how to check your answers when youre solving equations when youre checking your answers you want to make sure that your solution creates a true statement so lets say we have this equation and we think our solution after weve solved the problem is x equals negative 3 what were going to do is were going to substitute this value in for X so we get negative 3 times negative 3 plus 4 is equal to 13 now negative 3 times negative 3 is 9 and well just recopy everything else down here 9 plus 4 is 13 which does in fact equal 13 so this does create a true statement which means our solution of X is equal to negative 3 is correct now lets take a look at an example where our solution is incorrect and where we would create a false statement so here we have a multi-step equation and lets just say after we solve the problem we got a is equal to 8 were going to substitute this in for all of the a values on both sides of the equal sign and th

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How do you check a one step equation?

A one-step equation is an algebraic equation you can solve in only one step. Once youve solved it, youve found the value of the variable that makes the equation true. To solve one-step equations, we do the inverse (opposite) of whatever operation is being performed on the variable, so we get the variable by itself.

What is check in math?

Check numbers are a method of checking addition. Sometimes, this is called Casting out Nines. Check numbers also works with subtraction, multiplication, and division. I like to think of check numbers as a cool tool for my math toolbox. Some people use check numbers frequently, others, not so much.

What does check your solution mean?

Check a Solution. The process of making sure a solution is correct by making sure it satisfies any and all equations and/or inequalities in a problem. 1. Example: Verify that x = 3 is a solution of the equation x2 5x + 6 = 0.

How do you know if an equation is true?

Simply put, if there is an equal sign = then its an equation. It can be true like saying apple = apple or it can be false, like apple = sloth.

How can you check your answer when solving an equation?

0:07 2:15 Solving Equations: How to Check Your Answers - YouTube YouTube Start of suggested clip End of suggested clip When youre checking your answers you want to make sure that your solution creates a true statement.MoreWhen youre checking your answers you want to make sure that your solution creates a true statement.

What does it mean to check an equation?

In a math class, verifying that you arrived at the correct solution is very good practice. We check a solution to an equation by replacing the variable in the equation with the value of the solution. A solution should result in a true statement when simplified.

What are the 4 steps to solving an equation?

We have 4 ways of solving one-step equations: Adding, Substracting, multiplication and division. If we add the same number to both sides of an equation, both sides will remain equal.

How to do rs and ls?

To perform the L.S. R.S. Check, all you need to do is substitute the values of x and y in question into your equation(s) and simplify. For example, if you wanted to know if the point (2, 3) is the POI of the lines �� = 2�� + 7 and �� = 3�� + 1, simply substitute x = 2 and y = 3 into the equations and simplify!

What does it mean to verify an equation?

Verifying a solution ensures the solution satisfies any equation or inequality by using substitution. Example One. Verify whether or not x = 3 is a solution to the conditional equation 2x - 3 = 6 - x. Substitute x = 3 into 2x - 3 = 6 - x to see if a true or false statement results.

How do you check math answers?

Five Strategies for Checking Math Answers Redo the math problems, on a separate piece of paper, without looking at the work that was already done. Use the opposite operation to check, if possible. Ask whether the answer is logical. Substitute the solution into the equation, if possible.

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