Question

How do you solve `y + (-3) = 7`?

Answer 1

10

Explanation:

When you add together a positive number and a negative number, the positive number, the positive and the negative cancel and become a negative.

Because of this `y+(-3)=7` becomes `y-3=7`
This can then be solved as a linear equation:
`y-3=7`
`y-3+3=7+3`
`y=7+3`

Therefore:
`y=10`