-a-3(3+6a)=3(1-6a)

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

Simplifying
-1a + -3(3 + 6a) = 3(1 + -6a)
-1a + (3 * -3 + 6a * -3) = 3(1 + -6a)
-1a + (-9 + -18a) = 3(1 + -6a)

Reorder the terms:
-9 + -1a + -18a = 3(1 + -6a)

Combine like terms: -1a + -18a = -19a
-9 + -19a = 3(1 + -6a)
-9 + -19a = (1 * 3 + -6a * 3)
-9 + -19a = (3 + -18a)

Solving
-9 + -19a = 3 + -18a

Solving for variable 'a'.

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

Add '18a' to each side of the equation.
-9 + -19a + 18a = 3 + -18a + 18a

Combine like terms: -19a + 18a = -1a
-9 + -1a = 3 + -18a + 18a

Combine like terms: -18a + 18a = 0
-9 + -1a = 3 + 0
-9 + -1a = 3

Add '9' to each side of the equation.
-9 + 9 + -1a = 3 + 9

Combine like terms: -9 + 9 = 0
0 + -1a = 3 + 9
-1a = 3 + 9

Combine like terms: 3 + 9 = 12
-1a = 12

Divide each side by '-1'.
a = -12

Simplifying
a = -12