8x-30-4x=42

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Solution for 8x-30-4x=42 equation:


Simplifying
8x + -30 + -4x = 42

Reorder the terms:
-30 + 8x + -4x = 42

Combine like terms: 8x + -4x = 4x
-30 + 4x = 42

Solving
-30 + 4x = 42

Solving for variable 'x'.

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

Add '30' to each side of the equation.
-30 + 30 + 4x = 42 + 30

Combine like terms: -30 + 30 = 0
0 + 4x = 42 + 30
4x = 42 + 30

Combine like terms: 42 + 30 = 72
4x = 72

Divide each side by '4'.
x = 18

Simplifying
x = 18

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