X+2x-3+(-3)=42

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

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

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

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

Solving
-6 + X + 2x = 42

Solving for variable 'X'.

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

Add '6' to each side of the equation.
-6 + X + 6 + 2x = 42 + 6

Reorder the terms:
-6 + 6 + X + 2x = 42 + 6

Combine like terms: -6 + 6 = 0
0 + X + 2x = 42 + 6
X + 2x = 42 + 6

Combine like terms: 42 + 6 = 48
X + 2x = 48

Add '-2x' to each side of the equation.
X + 2x + -2x = 48 + -2x

Combine like terms: 2x + -2x = 0
X + 0 = 48 + -2x
X = 48 + -2x

Simplifying
X = 48 + -2x