3x-4y=420

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Solution for 3x-4y=420 equation: 


Simplifying
3x + -4y = 420

Solving
3x + -4y = 420

Solving for variable 'x'.

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

Add '4y' to each side of the equation.
3x + -4y + 4y = 420 + 4y

Combine like terms: -4y + 4y = 0
3x + 0 = 420 + 4y
3x = 420 + 4y

Divide each side by '3'.
x = 140 + 1.333333333y

Simplifying
x = 140 + 1.333333333y

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