-2a+8+9a=7a-4a

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Solution for -2a+8+9a=7a-4a equation:


Simplifying
-2a + 8 + 9a = 7a + -4a

Reorder the terms:
8 + -2a + 9a = 7a + -4a

Combine like terms: -2a + 9a = 7a
8 + 7a = 7a + -4a

Combine like terms: 7a + -4a = 3a
8 + 7a = 3a

Solving
8 + 7a = 3a

Solving for variable 'a'.

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

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

Combine like terms: 7a + -3a = 4a
8 + 4a = 3a + -3a

Combine like terms: 3a + -3a = 0
8 + 4a = 0

Add '-8' to each side of the equation.
8 + -8 + 4a = 0 + -8

Combine like terms: 8 + -8 = 0
0 + 4a = 0 + -8
4a = 0 + -8

Combine like terms: 0 + -8 = -8
4a = -8

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

Simplifying
a = -2

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