First, it'll help you to understand what "answer" means. The "answer" is the number
that 'x' must be in order to make your equation a true statement. There's only one
number that can do that.
Here's an easy way to find it:
x + 29 = 87
What do you have to do to the left side to get 'x' all alone ?
Whatever it is, do the same thing to each side.
Subtract 29 from each side:
x = 87 - 29
x = 58
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