7-x=3+y

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Solution for 7-x=3+y equation: 


Simplifying
7 + -1x = 3 + y

Solving
7 + -1x = 3 + y

Solving for variable 'x'.

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

Add '-7' to each side of the equation.
7 + -7 + -1x = 3 + -7 + y

Combine like terms: 7 + -7 = 0
0 + -1x = 3 + -7 + y
-1x = 3 + -7 + y

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

Divide each side by '-1'.
x = 4 + -1y

Simplifying
x = 4 + -1y

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