7=.4x-y

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Solution for 7=.4x-y equation:


Simplifying
7 = 0.4x + -1y

Solving
7 = 0.4x + -1y

Solving for variable 'x'.

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

Add '-0.4x' to each side of the equation.
7 + -0.4x = 0.4x + -0.4x + -1y

Combine like terms: 0.4x + -0.4x = 0.0
7 + -0.4x = 0.0 + -1y
7 + -0.4x = -1y

Add '-7' to each side of the equation.
7 + -7 + -0.4x = -7 + -1y

Combine like terms: 7 + -7 = 0
0 + -0.4x = -7 + -1y
-0.4x = -7 + -1y

Divide each side by '-0.4'.
x = 17.5 + 2.5y

Simplifying
x = 17.5 + 2.5y

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