2(a+1)=20

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Solution for 2(a+1)=20 equation: 


Simplifying
2(a + 1) = 20

Reorder the terms:
2(1 + a) = 20
(1 * 2 + a * 2) = 20
(2 + 2a) = 20

Solving
2 + 2a = 20

Solving for variable 'a'.

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

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

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

Combine like terms: 20 + -2 = 18
2a = 18

Divide each side by '2'.
a = 9

Simplifying
a = 9

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