4a-9=-3a+12

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Solution for 4a-9=-3a+12 equation:


Simplifying
4a + -9 = -3a + 12

Reorder the terms:
-9 + 4a = -3a + 12

Reorder the terms:
-9 + 4a = 12 + -3a

Solving
-9 + 4a = 12 + -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.
-9 + 4a + 3a = 12 + -3a + 3a

Combine like terms: 4a + 3a = 7a
-9 + 7a = 12 + -3a + 3a

Combine like terms: -3a + 3a = 0
-9 + 7a = 12 + 0
-9 + 7a = 12

Add '9' to each side of the equation.
-9 + 9 + 7a = 12 + 9

Combine like terms: -9 + 9 = 0
0 + 7a = 12 + 9
7a = 12 + 9

Combine like terms: 12 + 9 = 21
7a = 21

Divide each side by '7'.
a = 3

Simplifying
a = 3

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