3X+6+2X-4=42

Solution for 3X+6+2X-4=42 equation:

Simplifying
3X + 6 + 2X + -4 = 42

Reorder the terms:
6 + -4 + 3X + 2X = 42

Combine like terms: 6 + -4 = 2
2 + 3X + 2X = 42

Combine like terms: 3X + 2X = 5X
2 + 5X = 42

Solving
2 + 5X = 42

Solving for variable 'X'.

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

Add '-2' to each side of the equation.
2 + -2 + 5X = 42 + -2

Combine like terms: 2 + -2 = 0
0 + 5X = 42 + -2
5X = 42 + -2

Combine like terms: 42 + -2 = 40
5X = 40

Divide each side by '5'.
X = 8

Simplifying
X = 8