127=-x+90

Solution for 127=-x+90 equation:

Simplifying
127 = -1x + 90

Reorder the terms:
127 = 90 + -1x

Solving
127 = 90 + -1x

Solving for variable 'x'.

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

Add 'x' to each side of the equation.
127 + x = 90 + -1x + x

Combine like terms: -1x + x = 0
127 + x = 90 + 0
127 + x = 90

Add '-127' to each side of the equation.
127 + -127 + x = 90 + -127

Combine like terms: 127 + -127 = 0
0 + x = 90 + -127
x = 90 + -127

Combine like terms: 90 + -127 = -37
x = -37

Simplifying
x = -37