4(7+2a)-8(1+6a)=-20

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Solution for 4(7+2a)-8(1+6a)=-20 equation: 


Simplifying
4(7 + 2a) + -8(1 + 6a) = -20
(7 * 4 + 2a * 4) + -8(1 + 6a) = -20
(28 + 8a) + -8(1 + 6a) = -20
28 + 8a + (1 * -8 + 6a * -8) = -20
28 + 8a + (-8 + -48a) = -20

Reorder the terms:
28 + -8 + 8a + -48a = -20

Combine like terms: 28 + -8 = 20
20 + 8a + -48a = -20

Combine like terms: 8a + -48a = -40a
20 + -40a = -20

Solving
20 + -40a = -20

Solving for variable 'a'.

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

Add '-20' to each side of the equation.
20 + -20 + -40a = -20 + -20

Combine like terms: 20 + -20 = 0
0 + -40a = -20 + -20
-40a = -20 + -20

Combine like terms: -20 + -20 = -40
-40a = -40

Divide each side by '-40'.
a = 1

Simplifying
a = 1

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