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kris2685
solve using the addition principle -42+y=3
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
you can also call it the additive inverse