## When your math teacher says “x=64,” what number could replace x? You might be thinking that the answer is 64, but this isn’t always true.

In fact, there are a lot of different numbers that can substitute for x in certain equations. Let’s take a look at five examples where one number substitutes for another: 1) 4 = 16: If you subtract 16-4 from both sides of the equation and divide by 2 on both sides, then you get 1=8. So 8 can substitute as 4 in this instance! 2) 3+6=9: When we add 6 to both sides of the equation and divide by 2 on each side we find that 9 is equivalent to 3.It-).

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