2(a-4)-2=20

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Solution for 2(a-4)-2=20 equation:


Simplifying
2(a + -4) + -2 = 20

Reorder the terms:
2(-4 + a) + -2 = 20
(-4 * 2 + a * 2) + -2 = 20
(-8 + 2a) + -2 = 20

Reorder the terms:
-8 + -2 + 2a = 20

Combine like terms: -8 + -2 = -10
-10 + 2a = 20

Solving
-10 + 2a = 20

Solving for variable 'a'.

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

Add '10' to each side of the equation.
-10 + 10 + 2a = 20 + 10

Combine like terms: -10 + 10 = 0
0 + 2a = 20 + 10
2a = 20 + 10

Combine like terms: 20 + 10 = 30
2a = 30

Divide each side by '2'.
a = 15

Simplifying
a = 15

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