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

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


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

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

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

Solving
-1 + -2a = 8 + 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.
-1 + -2a + -1a = 8 + a + -1a

Combine like terms: -2a + -1a = -3a
-1 + -3a = 8 + a + -1a

Combine like terms: a + -1a = 0
-1 + -3a = 8 + 0
-1 + -3a = 8

Add '1' to each side of the equation.
-1 + 1 + -3a = 8 + 1

Combine like terms: -1 + 1 = 0
0 + -3a = 8 + 1
-3a = 8 + 1

Combine like terms: 8 + 1 = 9
-3a = 9

Divide each side by '-3'.
a = -3

Simplifying
a = -3

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