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

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


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

Reorder the terms:
7 + -7(2 + a) = 9 + a
7 + (2 * -7 + a * -7) = 9 + a
7 + (-14 + -7a) = 9 + a

Combine like terms: 7 + -14 = -7
-7 + -7a = 9 + a

Solving
-7 + -7a = 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.
-7 + -7a + -1a = 9 + a + -1a

Combine like terms: -7a + -1a = -8a
-7 + -8a = 9 + a + -1a

Combine like terms: a + -1a = 0
-7 + -8a = 9 + 0
-7 + -8a = 9

Add '7' to each side of the equation.
-7 + 7 + -8a = 9 + 7

Combine like terms: -7 + 7 = 0
0 + -8a = 9 + 7
-8a = 9 + 7

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

Divide each side by '-8'.
a = -2

Simplifying
a = -2

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