How do you solve $x + 5 = 12$ ?

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Answer 1 · 2018-06-07T18:41:02

$x=7$

The key insight here is that we want to solve for $x$ , and in doing so, we need to undo any operation being applied to it.

Right now, only $5$ is being added to it, so to solve for it, we need to do the inverse operation, subtraction.

Remember, we subtract $5$ from both sides to maintain the equality. We get

$color(purple)(x=7)$

We can even plug in $7$ for $x$ to make sure our answer is reasonable:

$color(purple)7+5=12$

$=>12=12$

This is true, so $x=7$ is our solution.

Hope this helps!

How do you solve x + 5 = 12x + 5 = 12?