13x+3+2x=-42

Solution for 13x+3+2x=-42 equation:

Simplifying
13x + 3 + 2x = -42

Reorder the terms:
3 + 13x + 2x = -42

Combine like terms: 13x + 2x = 15x
3 + 15x = -42

Solving
3 + 15x = -42

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 + 15x = -42 + -3

Combine like terms: 3 + -3 = 0
0 + 15x = -42 + -3
15x = -42 + -3

Combine like terms: -42 + -3 = -45
15x = -45

Divide each side by '15'.
x = -3

Simplifying
x = -3