-3(1+7a)+a=

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

Simplifying
-3(1 + 7a) + a = 0
(1 * -3 + 7a * -3) + a = 0
(-3 + -21a) + a = 0

Combine like terms: -21a + a = -20a
-3 + -20a = 0

Solving
-3 + -20a = 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 + -20a = 0 + 3

Combine like terms: -3 + 3 = 0
0 + -20a = 0 + 3
-20a = 0 + 3

Combine like terms: 0 + 3 = 3
-20a = 3

Divide each side by '-20'.
a = -0.15

Simplifying
a = -0.15