2(y-(x-y))+y=91

Solution for 2(y-(x-y))+y=91 equation:

Simplifying
2(y + -1(x + -1y)) + y = 91
2(y + (x * -1 + -1y * -1)) + y = 91
2(y + (-1x + 1y)) + y = 91

Reorder the terms:
2(-1x + y + 1y) + y = 91

Combine like terms: y + 1y = 2y
2(-1x + 2y) + y = 91
(-1x * 2 + 2y * 2) + y = 91
(-2x + 4y) + y = 91

Combine like terms: 4y + y = 5y
-2x + 5y = 91

Solving
-2x + 5y = 91

Solving for variable 'x'.

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

Add '-5y' to each side of the equation.
-2x + 5y + -5y = 91 + -5y

Combine like terms: 5y + -5y = 0
-2x + 0 = 91 + -5y
-2x = 91 + -5y

Divide each side by '-2'.
x = -45.5 + 2.5y

Simplifying
x = -45.5 + 2.5y