3(x+2)-1=20

Solution for 3(x+2)-1=20 equation:

Simplifying
3(x + 2) + -1 = 20

Reorder the terms:
3(2 + x) + -1 = 20
(2 * 3 + x * 3) + -1 = 20
(6 + 3x) + -1 = 20

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

Combine like terms: 6 + -1 = 5
5 + 3x = 20

Solving
5 + 3x = 20

Solving for variable 'x'.

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

Add '-5' to each side of the equation.
5 + -5 + 3x = 20 + -5

Combine like terms: 5 + -5 = 0
0 + 3x = 20 + -5
3x = 20 + -5

Combine like terms: 20 + -5 = 15
3x = 15

Divide each side by '3'.
x = 5

Simplifying
x = 5