a+2(a+1)=12+8

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Solution for a+2(a+1)=12+8 equation: 


Simplifying
a + 2(a + 1) = 12 + 8

Reorder the terms:
a + 2(1 + a) = 12 + 8
a + (1 * 2 + a * 2) = 12 + 8
a + (2 + 2a) = 12 + 8

Reorder the terms:
2 + a + 2a = 12 + 8

Combine like terms: a + 2a = 3a
2 + 3a = 12 + 8

Combine like terms: 12 + 8 = 20
2 + 3a = 20

Solving
2 + 3a = 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 + 3a = 20 + -2

Combine like terms: 2 + -2 = 0
0 + 3a = 20 + -2
3a = 20 + -2

Combine like terms: 20 + -2 = 18
3a = 18

Divide each side by '3'.
a = 6

Simplifying
a = 6

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