-a-7=2a+8

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


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

Reorder the terms:
-7 + -1a = 2a + 8

Reorder the terms:
-7 + -1a = 8 + 2a

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

Solving for variable 'a'.

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

Add '-2a' to each side of the equation.
-7 + -1a + -2a = 8 + 2a + -2a

Combine like terms: -1a + -2a = -3a
-7 + -3a = 8 + 2a + -2a

Combine like terms: 2a + -2a = 0
-7 + -3a = 8 + 0
-7 + -3a = 8

Add '7' to each side of the equation.
-7 + 7 + -3a = 8 + 7

Combine like terms: -7 + 7 = 0
0 + -3a = 8 + 7
-3a = 8 + 7

Combine like terms: 8 + 7 = 15
-3a = 15

Divide each side by '-3'.
a = -5

Simplifying
a = -5

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