7-8(a+2)=9+a

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Solution for 7-8(a+2)=9+a equation:


Simplifying
7 + -8(a + 2) = 9 + a

Reorder the terms:
7 + -8(2 + a) = 9 + a
7 + (2 * -8 + a * -8) = 9 + a
7 + (-16 + -8a) = 9 + a

Combine like terms: 7 + -16 = -9
-9 + -8a = 9 + a

Solving
-9 + -8a = 9 + 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.
-9 + -8a + -1a = 9 + a + -1a

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

Combine like terms: a + -1a = 0
-9 + -9a = 9 + 0
-9 + -9a = 9

Add '9' to each side of the equation.
-9 + 9 + -9a = 9 + 9

Combine like terms: -9 + 9 = 0
0 + -9a = 9 + 9
-9a = 9 + 9

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

Divide each side by '-9'.
a = -2

Simplifying
a = -2

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