7(A-4)=21

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Solution for 7(A-4)=21 equation: 


Simplifying
7(A + -4) = 21

Reorder the terms:
7(-4 + A) = 21
(-4 * 7 + A * 7) = 21
(-28 + 7A) = 21

Solving
-28 + 7A = 21

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 + 7A = 21 + 28

Combine like terms: -28 + 28 = 0
0 + 7A = 21 + 28
7A = 21 + 28

Combine like terms: 21 + 28 = 49
7A = 49

Divide each side by '7'.
A = 7

Simplifying
A = 7

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