3x-42=30

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Solution for 3x-42=30 equation: 


Simplifying
3x + -42 = 30

Reorder the terms:
-42 + 3x = 30

Solving
-42 + 3x = 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 + 3x = 30 + 42

Combine like terms: -42 + 42 = 0
0 + 3x = 30 + 42
3x = 30 + 42

Combine like terms: 30 + 42 = 72
3x = 72

Divide each side by '3'.
x = 24

Simplifying
x = 24

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