-1+31=-7-7a-8-2a

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Solution for -1+31=-7-7a-8-2a equation:


Simplifying
-1 + 31 = -7 + -7a + -8 + -2a

Combine like terms: -1 + 31 = 30
30 = -7 + -7a + -8 + -2a

Reorder the terms:
30 = -7 + -8 + -7a + -2a

Combine like terms: -7 + -8 = -15
30 = -15 + -7a + -2a

Combine like terms: -7a + -2a = -9a
30 = -15 + -9a

Solving
30 = -15 + -9a

Solving for variable 'a'.

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

Add '9a' to each side of the equation.
30 + 9a = -15 + -9a + 9a

Combine like terms: -9a + 9a = 0
30 + 9a = -15 + 0
30 + 9a = -15

Add '-30' to each side of the equation.
30 + -30 + 9a = -15 + -30

Combine like terms: 30 + -30 = 0
0 + 9a = -15 + -30
9a = -15 + -30

Combine like terms: -15 + -30 = -45
9a = -45

Divide each side by '9'.
a = -5

Simplifying
a = -5

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