How do you do:
2(n-7)+3=9
and:
4h+7h-16=6

To solve equations with variables, we use inverse operations.
Inverse operations are operations that cancel each other out.
(plus and minus, multiply and divide)

Say we had .
According to the addition property of equality, we could add 3 to each side of that equation and it would still be equal.

This would cancel out the -3 and leave us with just .

Question 1) Solve .

Let's just start cancelling things out. Doesn't matter what order.



Question 2) Solve .

You can add and together to get . The h acts sort of like a unit in that case, like 4 feet + 7 feet = 11 feet.

The first one is correct