7(2a-8)=21

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Solution for 7(2a-8)=21 equation:


Simplifying
7(2a + -8) = 21

Reorder the terms:
7(-8 + 2a) = 21
(-8 * 7 + 2a * 7) = 21
(-56 + 14a) = 21

Solving
-56 + 14a = 21

Solving for variable 'a'.

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

Add '56' to each side of the equation.
-56 + 56 + 14a = 21 + 56

Combine like terms: -56 + 56 = 0
0 + 14a = 21 + 56
14a = 21 + 56

Combine like terms: 21 + 56 = 77
14a = 77

Divide each side by '14'.
a = 5.5

Simplifying
a = 5.5

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