-4a+123=2a+81

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Solution for -4a+123=2a+81 equation:


Simplifying
-4a + 123 = 2a + 81

Reorder the terms:
123 + -4a = 2a + 81

Reorder the terms:
123 + -4a = 81 + 2a

Solving
123 + -4a = 81 + 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.
123 + -4a + -2a = 81 + 2a + -2a

Combine like terms: -4a + -2a = -6a
123 + -6a = 81 + 2a + -2a

Combine like terms: 2a + -2a = 0
123 + -6a = 81 + 0
123 + -6a = 81

Add '-123' to each side of the equation.
123 + -123 + -6a = 81 + -123

Combine like terms: 123 + -123 = 0
0 + -6a = 81 + -123
-6a = 81 + -123

Combine like terms: 81 + -123 = -42
-6a = -42

Divide each side by '-6'.
a = 7

Simplifying
a = 7

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