.5x+.2y=3.15

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Solution for .5x+.2y=3.15 equation: 


Simplifying
0.5x + 0.2y = 3.15

Solving
0.5x + 0.2y = 3.15

Solving for variable 'x'.

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

Add '-0.2y' to each side of the equation.
0.5x + 0.2y + -0.2y = 3.15 + -0.2y

Combine like terms: 0.2y + -0.2y = 0.0
0.5x + 0.0 = 3.15 + -0.2y
0.5x = 3.15 + -0.2y

Divide each side by '0.5'.
x = 6.3 + -0.4y

Simplifying
x = 6.3 + -0.4y

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