y+-x+3=0

Solution for y+-x+3=0 equation:

Simplifying
y + -1x + 3 = 0

Reorder the terms:
3 + -1x + y = 0

Solving
3 + -1x + y = 0

Solving for variable 'x'.

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

Add '-3' to each side of the equation.
3 + -1x + -3 + y = 0 + -3

Reorder the terms:
3 + -3 + -1x + y = 0 + -3

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

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

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

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

Divide each side by '-1'.
x = 3 + y

Simplifying
x = 3 + y