8x+42+15x=30

Solution for 8x+42+15x=30 equation:

Simplifying
8x + 42 + 15x = 30

Reorder the terms:
42 + 8x + 15x = 30

Combine like terms: 8x + 15x = 23x
42 + 23x = 30

Solving
42 + 23x = 30

Solving for variable 'x'.

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

Add '-42' to each side of the equation.
42 + -42 + 23x = 30 + -42

Combine like terms: 42 + -42 = 0
0 + 23x = 30 + -42
23x = 30 + -42

Combine like terms: 30 + -42 = -12
23x = -12

Divide each side by '23'.
x = -0.5217391304

Simplifying
x = -0.5217391304