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

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


Simplifying
-7 = -1(2 + 2a) + 9a
-7 = (2 * -1 + 2a * -1) + 9a
-7 = (-2 + -2a) + 9a

Combine like terms: -2a + 9a = 7a
-7 = -2 + 7a

Solving
-7 = -2 + 7a

Solving for variable 'a'.

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

Add '-7a' to each side of the equation.
-7 + -7a = -2 + 7a + -7a

Combine like terms: 7a + -7a = 0
-7 + -7a = -2 + 0
-7 + -7a = -2

Add '7' to each side of the equation.
-7 + 7 + -7a = -2 + 7

Combine like terms: -7 + 7 = 0
0 + -7a = -2 + 7
-7a = -2 + 7

Combine like terms: -2 + 7 = 5
-7a = 5

Divide each side by '-7'.
a = -0.7142857143

Simplifying
a = -0.7142857143

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