2(a-10)+2a=28

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Solution for 2(a-10)+2a=28 equation: 


Simplifying
2(a + -10) + 2a = 28

Reorder the terms:
2(-10 + a) + 2a = 28
(-10 * 2 + a * 2) + 2a = 28
(-20 + 2a) + 2a = 28

Combine like terms: 2a + 2a = 4a
-20 + 4a = 28

Solving
-20 + 4a = 28

Solving for variable 'a'.

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

Add '20' to each side of the equation.
-20 + 20 + 4a = 28 + 20

Combine like terms: -20 + 20 = 0
0 + 4a = 28 + 20
4a = 28 + 20

Combine like terms: 28 + 20 = 48
4a = 48

Divide each side by '4'.
a = 12

Simplifying
a = 12

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