Question

QUICKLY HELP!
Solve for a.
a+(−5)=−12
What is the answer?
a. a=−17
b. a=−7
c. a = 7
d. a = 17

Answer 1

a+(−5)=−12

a−5=−12

a = -12 + 5

a = -7

answer is b. a=−7

Answer 2

a+(-5)=-12 ...positive (+) and negative (-) make a negative (-)
a-5=-12 ...move -5 to the other side using addition
a-5+5=12+5
a=17

The answer is the fourth choice, d. a=17.