6=3(1+-3a)

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

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

Solving
6 = 3 + -9a

Solving for variable 'a'.

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

Add '9a' to each side of the equation.
6 + 9a = 3 + -9a + 9a

Combine like terms: -9a + 9a = 0
6 + 9a = 3 + 0
6 + 9a = 3

Add '-6' to each side of the equation.
6 + -6 + 9a = 3 + -6

Combine like terms: 6 + -6 = 0
0 + 9a = 3 + -6
9a = 3 + -6

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

Divide each side by '9'.
a = -0.3333333333

Simplifying
a = -0.3333333333