139=3-8(7-8a)

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Solution for 139=3-8(7-8a) equation:


Simplifying
139 = 3 + -8(7 + -8a)
139 = 3 + (7 * -8 + -8a * -8)
139 = 3 + (-56 + 64a)

Combine like terms: 3 + -56 = -53
139 = -53 + 64a

Solving
139 = -53 + 64a

Solving for variable 'a'.

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

Add '-64a' to each side of the equation.
139 + -64a = -53 + 64a + -64a

Combine like terms: 64a + -64a = 0
139 + -64a = -53 + 0
139 + -64a = -53

Add '-139' to each side of the equation.
139 + -139 + -64a = -53 + -139

Combine like terms: 139 + -139 = 0
0 + -64a = -53 + -139
-64a = -53 + -139

Combine like terms: -53 + -139 = -192
-64a = -192

Divide each side by '-64'.
a = 3

Simplifying
a = 3

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