(3+3)+3(x-1)=20

Solution for (3+3)+3(x-1)=20 equation:

Simplifying
(3 + 3) + 3(x + -1) = 20

Combine like terms: 3 + 3 = 6
(6) + 3(x + -1) = 20
6 + 3(x + -1) = 20

Reorder the terms:
6 + 3(-1 + x) = 20
6 + (-1 * 3 + x * 3) = 20
6 + (-3 + 3x) = 20

Combine like terms: 6 + -3 = 3
3 + 3x = 20

Solving
3 + 3x = 20

Solving for variable 'x'.

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

Add '-3' to each side of the equation.
3 + -3 + 3x = 20 + -3

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

Combine like terms: 20 + -3 = 17
3x = 17

Divide each side by '3'.
x = 5.666666667

Simplifying
x = 5.666666667