8-2(a+1)=9+9

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Solution for 8-2(a+1)=9+9 equation:


Simplifying
8 + -2(a + 1) = 9 + 9

Reorder the terms:
8 + -2(1 + a) = 9 + 9
8 + (1 * -2 + a * -2) = 9 + 9
8 + (-2 + -2a) = 9 + 9

Combine like terms: 8 + -2 = 6
6 + -2a = 9 + 9

Combine like terms: 9 + 9 = 18
6 + -2a = 18

Solving
6 + -2a = 18

Solving for variable 'a'.

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

Add '-6' to each side of the equation.
6 + -6 + -2a = 18 + -6

Combine like terms: 6 + -6 = 0
0 + -2a = 18 + -6
-2a = 18 + -6

Combine like terms: 18 + -6 = 12
-2a = 12

Divide each side by '-2'.
a = -6

Simplifying
a = -6

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