(x-1)+(8x+4)+(9x-4)=y

Solution for (x-1)+(8x+4)+(9x-4)=y equation:

Simplifying
(x + -1) + (8x + 4) + (9x + -4) = y

Reorder the terms:
(-1 + x) + (8x + 4) + (9x + -4) = y

Remove parenthesis around (-1 + x)
-1 + x + (8x + 4) + (9x + -4) = y

Reorder the terms:
-1 + x + (4 + 8x) + (9x + -4) = y

Remove parenthesis around (4 + 8x)
-1 + x + 4 + 8x + (9x + -4) = y

Reorder the terms:
-1 + x + 4 + 8x + (-4 + 9x) = y

Remove parenthesis around (-4 + 9x)
-1 + x + 4 + 8x + -4 + 9x = y

Reorder the terms:
-1 + 4 + -4 + x + 8x + 9x = y

Combine like terms: -1 + 4 = 3
3 + -4 + x + 8x + 9x = y

Combine like terms: 3 + -4 = -1
-1 + x + 8x + 9x = y

Combine like terms: x + 8x = 9x
-1 + 9x + 9x = y

Combine like terms: 9x + 9x = 18x
-1 + 18x = y

Solving
-1 + 18x = y

Solving for variable 'x'.

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

Add '1' to each side of the equation.
-1 + 1 + 18x = 1 + y

Combine like terms: -1 + 1 = 0
0 + 18x = 1 + y
18x = 1 + y

Divide each side by '18'.
x = 0.05555555556 + 0.05555555556y

Simplifying
x = 0.05555555556 + 0.05555555556y