2a+9=123

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Solution for 2a+9=123 equation: 


Simplifying
2a + 9 = 123

Reorder the terms:
9 + 2a = 123

Solving
9 + 2a = 123

Solving for variable 'a'.

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

Add '-9' to each side of the equation.
9 + -9 + 2a = 123 + -9

Combine like terms: 9 + -9 = 0
0 + 2a = 123 + -9
2a = 123 + -9

Combine like terms: 123 + -9 = 114
2a = 114

Divide each side by '2'.
a = 57

Simplifying
a = 57

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