a-28=90

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Solution for a-28=90 equation: 


Simplifying
a + -28 = 90

Reorder the terms:
-28 + a = 90

Solving
-28 + a = 90

Solving for variable 'a'.

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

Add '28' to each side of the equation.
-28 + 28 + a = 90 + 28

Combine like terms: -28 + 28 = 0
0 + a = 90 + 28
a = 90 + 28

Combine like terms: 90 + 28 = 118
a = 118

Simplifying
a = 118

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