9-3(1+7c)=

Solution for 9-3(1+7c)= equation:

Simplifying
9 + -3(1 + 7c) = 0
9 + (1 * -3 + 7c * -3) = 0
9 + (-3 + -21c) = 0

Combine like terms: 9 + -3 = 6
6 + -21c = 0

Solving
6 + -21c = 0

Solving for variable 'c'.

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

Add '-6' to each side of the equation.
6 + -6 + -21c = 0 + -6

Combine like terms: 6 + -6 = 0
0 + -21c = 0 + -6
-21c = 0 + -6

Combine like terms: 0 + -6 = -6
-21c = -6

Divide each side by '-21'.
c = 0.2857142857

Simplifying
c = 0.2857142857