3(2x+5)-3=42

Solution for 3(2x+5)-3=42 equation:

Simplifying
3(2x + 5) + -3 = 42

Reorder the terms:
3(5 + 2x) + -3 = 42
(5 * 3 + 2x * 3) + -3 = 42
(15 + 6x) + -3 = 42

Reorder the terms:
15 + -3 + 6x = 42

Combine like terms: 15 + -3 = 12
12 + 6x = 42

Solving
12 + 6x = 42

Solving for variable 'x'.

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

Add '-12' to each side of the equation.
12 + -12 + 6x = 42 + -12

Combine like terms: 12 + -12 = 0
0 + 6x = 42 + -12
6x = 42 + -12

Combine like terms: 42 + -12 = 30
6x = 30

Divide each side by '6'.
x = 5

Simplifying
x = 5