0.3x-0.7y=3.9

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Solution for 0.3x-0.7y=3.9 equation: 


Simplifying
0.3x + -0.7y = 3.9

Solving
0.3x + -0.7y = 3.9

Solving for variable 'x'.

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

Add '0.7y' to each side of the equation.
0.3x + -0.7y + 0.7y = 3.9 + 0.7y

Combine like terms: -0.7y + 0.7y = 0.0
0.3x + 0.0 = 3.9 + 0.7y
0.3x = 3.9 + 0.7y

Divide each side by '0.3'.
x = 13 + 2.333333333y

Simplifying
x = 13 + 2.333333333y

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