30-4x=80

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Solution for 30-4x=80 equation: 


Simplifying
30 + -4x = 80

Solving
30 + -4x = 80

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 = 80 + -30

Combine like terms: 30 + -30 = 0
0 + -4x = 80 + -30
-4x = 80 + -30

Combine like terms: 80 + -30 = 50
-4x = 50

Divide each side by '-4'.
x = -12.5

Simplifying
x = -12.5

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