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miskamm [114]
3 years ago
14

-15 = 5a +12- 2a + 6 -11 -3 10 7

Mathematics
2 answers:
Elis [28]3 years ago
8 0

Answer:

a = -11

Step-by-step explanation:

-15 = 5a +12- 2a + 6

Combine like terms

-15 = 3a +18

Subtract 18 from each side

-15-18 = 3a+18-18

-33 = 3a

Divide each side by 3

-33/3 = 3a/3

-11 =a

just olya [345]3 years ago
3 0

Answer:

A

Step-by-step explanation:

So we have the equation:

-15=5a+12-2a+6

On the right combine like terms:

-15=5a-2a+12+6\\-15=3a+18

Subtract 18 from both sides. The right cancels:

(-15)-18=(3a+18)-18\\-33=3a

Divide both sides by 3:

(-33)/3=(3a)/3\\a=-11

The answer is A, -11.

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