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Verified Answer :

nataleighkirk

9a + -3(2a + -4) = 15

Reorder the terms:
9a + -3(-4 + 2a) = 15
9a + (-4 -3 + 2a -3) = 15
9a + (12 + -6a) = 15

Reorder the terms:
12 + 9a + -6a = 15

Combine like terms: 9a + -6a = 3a
12 + 3a = 15

Solving
12 + 3a = 15

Solving for variable 'a'.

Move all terms containing a to the left, all other terms to the right.

Add '-12' to each side of the equation.
12 + -12 + 3a = 15 + -12

Combine like terms: 12 + -12 = 0
0 + 3a = 15 + -12
3a = 15 + -12

Combine like terms: 15 + -12 = 3
3a = 3

Divide each side by '3'.
a = 1

Simplifying
a = 1

isaacholton7

The answer is a=1

Here's the math:

9a-3(2a-4)=15

9a-6a+12=15-------------------------------Distribute the -3 across the parenthesis

3a+12=15-----------------------------------Combine like terms

3a=3----------------------------------------Subtract 12 from both sides

a=1-------------------------------------------Divide 3 from both sides

Hope this helped!! :))

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