3(f+15)+3(f+15)=35

Solution for 3(f+15)+3(f+15)=35 equation:

Simplifying
3(f + 15) + 3(f + 15) = 35

Reorder the terms:
3(15 + f) + 3(f + 15) = 35
(15 * 3 + f * 3) + 3(f + 15) = 35
(45 + 3f) + 3(f + 15) = 35

Reorder the terms:
45 + 3f + 3(15 + f) = 35
45 + 3f + (15 * 3 + f * 3) = 35
45 + 3f + (45 + 3f) = 35

Reorder the terms:
45 + 45 + 3f + 3f = 35

Combine like terms: 45 + 45 = 90
90 + 3f + 3f = 35

Combine like terms: 3f + 3f = 6f
90 + 6f = 35

Solving
90 + 6f = 35

Solving for variable 'f'.

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

Add '-90' to each side of the equation.
90 + -90 + 6f = 35 + -90

Combine like terms: 90 + -90 = 0
0 + 6f = 35 + -90
6f = 35 + -90

Combine like terms: 35 + -90 = -55
6f = -55

Divide each side by '6'.
f = -9.166666667

Simplifying
f = -9.166666667