Question

solve using the addition principle
-42+y=3

Answer 1

y = 3 + 42
y = 45

Answer 2

add 42 to each side.

ex. 1. Solve: x + 6 = -15

Solution: Using the Addition Principle, add -6
to each side of the equation.

x + 6 - 6 = -15 - 6

The variable is now isolated.

x = -21

Answer 3

you can also call it the additive inverse