120-84=2a

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Solution for 120-84=2a equation:


Simplifying
120 + -84 = 2a

Combine like terms: 120 + -84 = 36
36 = 2a

Solving
36 = 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.
36 + -2a = 2a + -2a

Combine like terms: 2a + -2a = 0
36 + -2a = 0

Add '-36' to each side of the equation.
36 + -36 + -2a = 0 + -36

Combine like terms: 36 + -36 = 0
0 + -2a = 0 + -36
-2a = 0 + -36

Combine like terms: 0 + -36 = -36
-2a = -36

Divide each side by '-2'.
a = 18

Simplifying
a = 18

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