a+40=28

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Solution for a+40=28 equation: 


Simplifying
a + 40 = 28

Reorder the terms:
40 + a = 28

Solving
40 + a = 28

Solving for variable 'a'.

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

Add '-40' to each side of the equation.
40 + -40 + a = 28 + -40

Combine like terms: 40 + -40 = 0
0 + a = 28 + -40
a = 28 + -40

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

Simplifying
a = -12

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