8(a+2)-7(3a-2)=-9

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Solution for 8(a+2)-7(3a-2)=-9 equation:


Simplifying
8(a + 2) + -7(3a + -2) = -9

Reorder the terms:
8(2 + a) + -7(3a + -2) = -9
(2 * 8 + a * 8) + -7(3a + -2) = -9
(16 + 8a) + -7(3a + -2) = -9

Reorder the terms:
16 + 8a + -7(-2 + 3a) = -9
16 + 8a + (-2 * -7 + 3a * -7) = -9
16 + 8a + (14 + -21a) = -9

Reorder the terms:
16 + 14 + 8a + -21a = -9

Combine like terms: 16 + 14 = 30
30 + 8a + -21a = -9

Combine like terms: 8a + -21a = -13a
30 + -13a = -9

Solving
30 + -13a = -9

Solving for variable 'a'.

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

Add '-30' to each side of the equation.
30 + -30 + -13a = -9 + -30

Combine like terms: 30 + -30 = 0
0 + -13a = -9 + -30
-13a = -9 + -30

Combine like terms: -9 + -30 = -39
-13a = -39

Divide each side by '-13'.
a = 3

Simplifying
a = 3

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