8-7a=3a+9

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Solution for 8-7a=3a+9 equation:


Simplifying
8 + -7a = 3a + 9

Reorder the terms:
8 + -7a = 9 + 3a

Solving
8 + -7a = 9 + 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 = 9 + 3a + -3a

Combine like terms: -7a + -3a = -10a
8 + -10a = 9 + 3a + -3a

Combine like terms: 3a + -3a = 0
8 + -10a = 9 + 0
8 + -10a = 9

Add '-8' to each side of the equation.
8 + -8 + -10a = 9 + -8

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

Combine like terms: 9 + -8 = 1
-10a = 1

Divide each side by '-10'.
a = -0.1

Simplifying
a = -0.1

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