-128=8a-4(7+7a)

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Solution for -128=8a-4(7+7a) equation:


Simplifying
-128 = 8a + -4(7 + 7a)
-128 = 8a + (7 * -4 + 7a * -4)
-128 = 8a + (-28 + -28a)

Reorder the terms:
-128 = -28 + 8a + -28a

Combine like terms: 8a + -28a = -20a
-128 = -28 + -20a

Solving
-128 = -28 + -20a

Solving for variable 'a'.

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

Add '20a' to each side of the equation.
-128 + 20a = -28 + -20a + 20a

Combine like terms: -20a + 20a = 0
-128 + 20a = -28 + 0
-128 + 20a = -28

Add '128' to each side of the equation.
-128 + 128 + 20a = -28 + 128

Combine like terms: -128 + 128 = 0
0 + 20a = -28 + 128
20a = -28 + 128

Combine like terms: -28 + 128 = 100
20a = 100

Divide each side by '20'.
a = 5

Simplifying
a = 5

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