6a=3(6a-[6a+(7a-1)])+6

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Solution for 6a=3(6a-[6a+(7a-1)])+6 equation:


Simplifying
6a = 3(6a + -1[6a + (7a + -1)]) + 6

Reorder the terms:
6a = 3(6a + -1[6a + (-1 + 7a)]) + 6

Remove parenthesis around (-1 + 7a)
6a = 3(6a + -1[6a + -1 + 7a]) + 6

Reorder the terms:
6a = 3(6a + -1[-1 + 6a + 7a]) + 6

Combine like terms: 6a + 7a = 13a
6a = 3(6a + -1[-1 + 13a]) + 6
6a = 3(6a + [-1 * -1 + 13a * -1]) + 6
6a = 3(6a + [1 + -13a]) + 6

Reorder the terms:
6a = 3(1 + 6a + -13a) + 6

Combine like terms: 6a + -13a = -7a
6a = 3(1 + -7a) + 6
6a = (1 * 3 + -7a * 3) + 6
6a = (3 + -21a) + 6

Reorder the terms:
6a = 3 + 6 + -21a

Combine like terms: 3 + 6 = 9
6a = 9 + -21a

Solving
6a = 9 + -21a

Solving for variable 'a'.

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

Add '21a' to each side of the equation.
6a + 21a = 9 + -21a + 21a

Combine like terms: 6a + 21a = 27a
27a = 9 + -21a + 21a

Combine like terms: -21a + 21a = 0
27a = 9 + 0
27a = 9

Divide each side by '27'.
a = 0.3333333333

Simplifying
a = 0.3333333333

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