-(2a+6)+3(1+3a)=

Solution for -(2a+6)+3(1+3a)= equation:

Simplifying
-1(2a + 6) + 3(1 + 3a) = 0

Reorder the terms:
-1(6 + 2a) + 3(1 + 3a) = 0
(6 * -1 + 2a * -1) + 3(1 + 3a) = 0
(-6 + -2a) + 3(1 + 3a) = 0
-6 + -2a + (1 * 3 + 3a * 3) = 0
-6 + -2a + (3 + 9a) = 0

Reorder the terms:
-6 + 3 + -2a + 9a = 0

Combine like terms: -6 + 3 = -3
-3 + -2a + 9a = 0

Combine like terms: -2a + 9a = 7a
-3 + 7a = 0

Solving
-3 + 7a = 0

Solving for variable 'a'.

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

Add '3' to each side of the equation.
-3 + 3 + 7a = 0 + 3

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

Combine like terms: 0 + 3 = 3
7a = 3

Divide each side by '7'.
a = 0.4285714286

Simplifying
a = 0.4285714286