40=a+12

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Solution for 40=a+12 equation:


Simplifying
40 = a + 12

Reorder the terms:
40 = 12 + a

Solving
40 = 12 + a

Solving for variable 'a'.

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

Add '-1a' to each side of the equation.
40 + -1a = 12 + a + -1a

Combine like terms: a + -1a = 0
40 + -1a = 12 + 0
40 + -1a = 12

Add '-40' to each side of the equation.
40 + -40 + -1a = 12 + -40

Combine like terms: 40 + -40 = 0
0 + -1a = 12 + -40
-1a = 12 + -40

Combine like terms: 12 + -40 = -28
-1a = -28

Divide each side by '-1'.
a = 28

Simplifying
a = 28

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