-8=4a+9

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Solution for -8=4a+9 equation:


Simplifying
-8 = 4a + 9

Reorder the terms:
-8 = 9 + 4a

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

Combine like terms: 4a + -4a = 0
-8 + -4a = 9 + 0
-8 + -4a = 9

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

Combine like terms: -8 + 8 = 0
0 + -4a = 9 + 8
-4a = 9 + 8

Combine like terms: 9 + 8 = 17
-4a = 17

Divide each side by '-4'.
a = -4.25

Simplifying
a = -4.25

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