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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
