20-2a=9a-2

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Solution for 20-2a=9a-2 equation:


Simplifying
20 + -2a = 9a + -2

Reorder the terms:
20 + -2a = -2 + 9a

Solving
20 + -2a = -2 + 9a

Solving for variable 'a'.

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

Add '-9a' to each side of the equation.
20 + -2a + -9a = -2 + 9a + -9a

Combine like terms: -2a + -9a = -11a
20 + -11a = -2 + 9a + -9a

Combine like terms: 9a + -9a = 0
20 + -11a = -2 + 0
20 + -11a = -2

Add '-20' to each side of the equation.
20 + -20 + -11a = -2 + -20

Combine like terms: 20 + -20 = 0
0 + -11a = -2 + -20
-11a = -2 + -20

Combine like terms: -2 + -20 = -22
-11a = -22

Divide each side by '-11'.
a = 2

Simplifying
a = 2

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