2(a-7)=28

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Solution for 2(a-7)=28 equation: 


Simplifying
2(a + -7) = 28

Reorder the terms:
2(-7 + a) = 28
(-7 * 2 + a * 2) = 28
(-14 + 2a) = 28

Solving
-14 + 2a = 28

Solving for variable 'a'.

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

Add '14' to each side of the equation.
-14 + 14 + 2a = 28 + 14

Combine like terms: -14 + 14 = 0
0 + 2a = 28 + 14
2a = 28 + 14

Combine like terms: 28 + 14 = 42
2a = 42

Divide each side by '2'.
a = 21

Simplifying
a = 21

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