8.72-13=x+13-13

Solution for 8.72-13=x+13-13 equation:

Simplifying
8.72 + -13 = x + 13 + -13

Combine like terms: 8.72 + -13 = -4.28
-4.28 = x + 13 + -13

Reorder the terms:
-4.28 = 13 + -13 + x

Combine like terms: 13 + -13 = 0
-4.28 = 0 + x
-4.28 = x

Solving
-4.28 = x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
-4.28 + -1x = x + -1x

Combine like terms: x + -1x = 0
-4.28 + -1x = 0

Add '4.28' to each side of the equation.
-4.28 + 4.28 + -1x = 0 + 4.28

Combine like terms: -4.28 + 4.28 = 0.00
0.00 + -1x = 0 + 4.28
-1x = 0 + 4.28

Combine like terms: 0 + 4.28 = 4.28
-1x = 4.28

Divide each side by '-1'.
x = -4.28

Simplifying
x = -4.28