8-7(a-7)=3(1-2a)-7a

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Solution for 8-7(a-7)=3(1-2a)-7a equation:


Simplifying
8 + -7(a + -7) = 3(1 + -2a) + -7a

Reorder the terms:
8 + -7(-7 + a) = 3(1 + -2a) + -7a
8 + (-7 * -7 + a * -7) = 3(1 + -2a) + -7a
8 + (49 + -7a) = 3(1 + -2a) + -7a

Combine like terms: 8 + 49 = 57
57 + -7a = 3(1 + -2a) + -7a
57 + -7a = (1 * 3 + -2a * 3) + -7a
57 + -7a = (3 + -6a) + -7a

Combine like terms: -6a + -7a = -13a
57 + -7a = 3 + -13a

Solving
57 + -7a = 3 + -13a

Solving for variable 'a'.

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

Add '13a' to each side of the equation.
57 + -7a + 13a = 3 + -13a + 13a

Combine like terms: -7a + 13a = 6a
57 + 6a = 3 + -13a + 13a

Combine like terms: -13a + 13a = 0
57 + 6a = 3 + 0
57 + 6a = 3

Add '-57' to each side of the equation.
57 + -57 + 6a = 3 + -57

Combine like terms: 57 + -57 = 0
0 + 6a = 3 + -57
6a = 3 + -57

Combine like terms: 3 + -57 = -54
6a = -54

Divide each side by '6'.
a = -9

Simplifying
a = -9

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