20+a=2a-2

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


Simplifying
20 + a = 2a + -2

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

Solving
20 + a = -2 + 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.
20 + a + -2a = -2 + 2a + -2a

Combine like terms: a + -2a = -1a
20 + -1a = -2 + 2a + -2a

Combine like terms: 2a + -2a = 0
20 + -1a = -2 + 0
20 + -1a = -2

Add '-20' to each side of the equation.
20 + -20 + -1a = -2 + -20

Combine like terms: 20 + -20 = 0
0 + -1a = -2 + -20
-1a = -2 + -20

Combine like terms: -2 + -20 = -22
-1a = -22

Divide each side by '-1'.
a = 22

Simplifying
a = 22

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