.40x+y=3

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Solution for .40x+y=3 equation: 


Simplifying
0.40x + y = 3

Solving
0.40x + y = 3

Solving for variable 'x'.

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

Add '-1y' to each side of the equation.
0.40x + y + -1y = 3 + -1y

Combine like terms: y + -1y = 0
0.40x + 0 = 3 + -1y
0.40x = 3 + -1y

Divide each side by '0.40'.
x = 7.5 + -2.5y

Simplifying
x = 7.5 + -2.5y

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