12+x-15=y+((x+12)-(x-15))

Solution for 12+x-15=y+((x+12)-(x-15)) equation:

Simplifying
12 + x + -15 = y + ((x + 12) + -1(x + -15))

Reorder the terms:
12 + -15 + x = y + ((x + 12) + -1(x + -15))

Combine like terms: 12 + -15 = -3
-3 + x = y + ((x + 12) + -1(x + -15))

Reorder the terms:
-3 + x = y + ((12 + x) + -1(x + -15))

Remove parenthesis around (12 + x)
-3 + x = y + (12 + x + -1(x + -15))

Reorder the terms:
-3 + x = y + (12 + x + -1(-15 + x))
-3 + x = y + (12 + x + (-15 * -1 + x * -1))
-3 + x = y + (12 + x + (15 + -1x))

Reorder the terms:
-3 + x = y + (12 + 15 + x + -1x)

Combine like terms: 12 + 15 = 27
-3 + x = y + (27 + x + -1x)

Combine like terms: x + -1x = 0
-3 + x = y + (27 + 0)
-3 + x = y + (27)
-3 + x = y + 27

Reorder the terms:
-3 + x = 27 + y

Solving
-3 + x = 27 + y

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 + 3 + x = 27 + 3 + y

Combine like terms: -3 + 3 = 0
0 + x = 27 + 3 + y
x = 27 + 3 + y

Combine like terms: 27 + 3 = 30
x = 30 + y

Simplifying
x = 30 + y