2(a+1)=9+a+1

Solution for 2(a+1)=9+a+1 equation:

Simplifying
2(a + 1) = 9 + a + 1

Reorder the terms:
2(1 + a) = 9 + a + 1
(1 * 2 + a * 2) = 9 + a + 1
(2 + 2a) = 9 + a + 1

Reorder the terms:
2 + 2a = 9 + 1 + a

Combine like terms: 9 + 1 = 10
2 + 2a = 10 + a

Solving
2 + 2a = 10 + a

Solving for variable 'a'.

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

Add '-1a' to each side of the equation.
2 + 2a + -1a = 10 + a + -1a

Combine like terms: 2a + -1a = 1a
2 + 1a = 10 + a + -1a

Combine like terms: a + -1a = 0
2 + 1a = 10 + 0
2 + 1a = 10

Add '-2' to each side of the equation.
2 + -2 + 1a = 10 + -2

Combine like terms: 2 + -2 = 0
0 + 1a = 10 + -2
1a = 10 + -2

Combine like terms: 10 + -2 = 8
1a = 8

Divide each side by '1'.
a = 8

Simplifying
a = 8