20x+30=420

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Solution for 20x+30=420 equation: 


Simplifying
20x + 30 = 420

Reorder the terms:
30 + 20x = 420

Solving
30 + 20x = 420

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 + 20x = 420 + -30

Combine like terms: 30 + -30 = 0
0 + 20x = 420 + -30
20x = 420 + -30

Combine like terms: 420 + -30 = 390
20x = 390

Divide each side by '20'.
x = 19.5

Simplifying
x = 19.5

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