20-a=10-2

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Solution for 20-a=10-2 equation:


Simplifying
20 + -1a = 10 + -2

Combine like terms: 10 + -2 = 8
20 + -1a = 8

Solving
20 + -1a = 8

Solving for variable 'a'.

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

Add '-20' to each side of the equation.
20 + -20 + -1a = 8 + -20

Combine like terms: 20 + -20 = 0
0 + -1a = 8 + -20
-1a = 8 + -20

Combine like terms: 8 + -20 = -12
-1a = -12

Divide each side by '-1'.
a = 12

Simplifying
a = 12

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