8+4a=9a-7

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


Simplifying
8 + 4a = 9a + -7

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

Solving
8 + 4a = -7 + 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.
8 + 4a + -9a = -7 + 9a + -9a

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

Combine like terms: 9a + -9a = 0
8 + -5a = -7 + 0
8 + -5a = -7

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

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

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

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

Simplifying
a = 3

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