0.1x+0.3y=0.9

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Solution for 0.1x+0.3y=0.9 equation: 


Simplifying
0.1x + 0.3y = 0.9

Solving
0.1x + 0.3y = 0.9

Solving for variable 'x'.

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

Add '-0.3y' to each side of the equation.
0.1x + 0.3y + -0.3y = 0.9 + -0.3y

Combine like terms: 0.3y + -0.3y = 0.0
0.1x + 0.0 = 0.9 + -0.3y
0.1x = 0.9 + -0.3y

Divide each side by '0.1'.
x = 9 + -3y

Simplifying
x = 9 + -3y

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