3-a=4a-9

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Solution for 3-a=4a-9 equation:


Simplifying
3 + -1a = 4a + -9

Reorder the terms:
3 + -1a = -9 + 4a

Solving
3 + -1a = -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.
3 + -1a + -4a = -9 + 4a + -4a

Combine like terms: -1a + -4a = -5a
3 + -5a = -9 + 4a + -4a

Combine like terms: 4a + -4a = 0
3 + -5a = -9 + 0
3 + -5a = -9

Add '-3' to each side of the equation.
3 + -3 + -5a = -9 + -3

Combine like terms: 3 + -3 = 0
0 + -5a = -9 + -3
-5a = -9 + -3

Combine like terms: -9 + -3 = -12
-5a = -12

Divide each side by '-5'.
a = 2.4

Simplifying
a = 2.4

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