10-7a-2+9a=

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Solution for 10-7a-2+9a= equation:


Simplifying
10 + -7a + -2 + 9a = 0

Reorder the terms:
10 + -2 + -7a + 9a = 0

Combine like terms: 10 + -2 = 8
8 + -7a + 9a = 0

Combine like terms: -7a + 9a = 2a
8 + 2a = 0

Solving
8 + 2a = 0

Solving for variable 'a'.

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

Add '-8' to each side of the equation.
8 + -8 + 2a = 0 + -8

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

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

Divide each side by '2'.
a = -4

Simplifying
a = -4

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