4-2x=7-y

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Solution for 4-2x=7-y equation: 


Simplifying
4 + -2x = 7 + -1y

Solving
4 + -2x = 7 + -1y

Solving for variable 'x'.

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

Add '-4' to each side of the equation.
4 + -4 + -2x = 7 + -4 + -1y

Combine like terms: 4 + -4 = 0
0 + -2x = 7 + -4 + -1y
-2x = 7 + -4 + -1y

Combine like terms: 7 + -4 = 3
-2x = 3 + -1y

Divide each side by '-2'.
x = -1.5 + 0.5y

Simplifying
x = -1.5 + 0.5y

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