Question

Use an addition property to solve for a.

10 + (–15) = –15 + a

A.
–25

B.
–10

C.
–5

D.
10

Answer 1

10

Answer 2

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Answer 3

10 - 15 = -15 + a.

All you do is remove the parenthesis and think of it as subtraction.
10-15 = -5
so you have: -5 = -15 + a
now, add 15 to both sides, and you should get a = 10

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Answer 4

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