(9a+9)-(7a-3)=

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Solution for (9a+9)-(7a-3)= equation:


Simplifying
(9a + 9) + -1(7a + -3) = 0

Reorder the terms:
(9 + 9a) + -1(7a + -3) = 0

Remove parenthesis around (9 + 9a)
9 + 9a + -1(7a + -3) = 0

Reorder the terms:
9 + 9a + -1(-3 + 7a) = 0
9 + 9a + (-3 * -1 + 7a * -1) = 0
9 + 9a + (3 + -7a) = 0

Reorder the terms:
9 + 3 + 9a + -7a = 0

Combine like terms: 9 + 3 = 12
12 + 9a + -7a = 0

Combine like terms: 9a + -7a = 2a
12 + 2a = 0

Solving
12 + 2a = 0

Solving for variable 'a'.

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

Add '-12' to each side of the equation.
12 + -12 + 2a = 0 + -12

Combine like terms: 12 + -12 = 0
0 + 2a = 0 + -12
2a = 0 + -12

Combine like terms: 0 + -12 = -12
2a = -12

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

Simplifying
a = -6

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