3-a=2a-9

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Solution for 3-a=2a-9 equation:


Simplifying
3 + -1a = 2a + -9

Reorder the terms:
3 + -1a = -9 + 2a

Solving
3 + -1a = -9 + 2a

Solving for variable 'a'.

Move all terms containing a to the left, all other terms to the right.

Add '-2a' to each side of the equation.
3 + -1a + -2a = -9 + 2a + -2a

Combine like terms: -1a + -2a = -3a
3 + -3a = -9 + 2a + -2a

Combine like terms: 2a + -2a = 0
3 + -3a = -9 + 0
3 + -3a = -9

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

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

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

Divide each side by '-3'.
a = 4

Simplifying
a = 4

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