9a+7=4a-8

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


Simplifying
9a + 7 = 4a + -8

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

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

Solving
7 + 9a = -8 + 4a

Solving for variable 'a'.

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

Add '-4a' to each side of the equation.
7 + 9a + -4a = -8 + 4a + -4a

Combine like terms: 9a + -4a = 5a
7 + 5a = -8 + 4a + -4a

Combine like terms: 4a + -4a = 0
7 + 5a = -8 + 0
7 + 5a = -8

Add '-7' to each side of the equation.
7 + -7 + 5a = -8 + -7

Combine like terms: 7 + -7 = 0
0 + 5a = -8 + -7
5a = -8 + -7

Combine like terms: -8 + -7 = -15
5a = -15

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

Simplifying
a = -3

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