A-7=21

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Solution for A-7=21 equation: 


Simplifying
A + -7 = 21

Reorder the terms:
-7 + A = 21

Solving
-7 + A = 21

Solving for variable 'A'.

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

Add '7' to each side of the equation.
-7 + 7 + A = 21 + 7

Combine like terms: -7 + 7 = 0
0 + A = 21 + 7
A = 21 + 7

Combine like terms: 21 + 7 = 28
A = 28

Simplifying
A = 28

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