3a-(7-a)=9+6a

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Solution for 3a-(7-a)=9+6a equation:


Simplifying
3a + -1(7 + -1a) = 9 + 6a
3a + (7 * -1 + -1a * -1) = 9 + 6a
3a + (-7 + 1a) = 9 + 6a

Reorder the terms:
-7 + 3a + 1a = 9 + 6a

Combine like terms: 3a + 1a = 4a
-7 + 4a = 9 + 6a

Solving
-7 + 4a = 9 + 6a

Solving for variable 'a'.

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

Add '-6a' to each side of the equation.
-7 + 4a + -6a = 9 + 6a + -6a

Combine like terms: 4a + -6a = -2a
-7 + -2a = 9 + 6a + -6a

Combine like terms: 6a + -6a = 0
-7 + -2a = 9 + 0
-7 + -2a = 9

Add '7' to each side of the equation.
-7 + 7 + -2a = 9 + 7

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

Combine like terms: 9 + 7 = 16
-2a = 16

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

Simplifying
a = -8

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