-7a-8a=4-2a-7a-16

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Solution for -7a-8a=4-2a-7a-16 equation: 


Simplifying
-7a + -8a = 4 + -2a + -7a + -16

Combine like terms: -7a + -8a = -15a
-15a = 4 + -2a + -7a + -16

Reorder the terms:
-15a = 4 + -16 + -2a + -7a

Combine like terms: 4 + -16 = -12
-15a = -12 + -2a + -7a

Combine like terms: -2a + -7a = -9a
-15a = -12 + -9a

Solving
-15a = -12 + -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.
-15a + 9a = -12 + -9a + 9a

Combine like terms: -15a + 9a = -6a
-6a = -12 + -9a + 9a

Combine like terms: -9a + 9a = 0
-6a = -12 + 0
-6a = -12

Divide each side by '-6'.
a = 2

Simplifying
a = 2

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