-7a+2+8a=15-20

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Solution for -7a+2+8a=15-20 equation:


Simplifying
-7a + 2 + 8a = 15 + -20

Reorder the terms:
2 + -7a + 8a = 15 + -20

Combine like terms: -7a + 8a = 1a
2 + 1a = 15 + -20

Combine like terms: 15 + -20 = -5
2 + 1a = -5

Solving
2 + 1a = -5

Solving for variable 'a'.

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

Add '-2' to each side of the equation.
2 + -2 + 1a = -5 + -2

Combine like terms: 2 + -2 = 0
0 + 1a = -5 + -2
1a = -5 + -2

Combine like terms: -5 + -2 = -7
1a = -7

Divide each side by '1'.
a = -7

Simplifying
a = -7

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