30+75=x+15

Solution for 30+75=x+15 equation:

Simplifying
30 + 75 = x + 15

Combine like terms: 30 + 75 = 105
105 = x + 15

Reorder the terms:
105 = 15 + x

Solving
105 = 15 + 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.
105 + -1x = 15 + x + -1x

Combine like terms: x + -1x = 0
105 + -1x = 15 + 0
105 + -1x = 15

Add '-105' to each side of the equation.
105 + -105 + -1x = 15 + -105

Combine like terms: 105 + -105 = 0
0 + -1x = 15 + -105
-1x = 15 + -105

Combine like terms: 15 + -105 = -90
-1x = -90

Divide each side by '-1'.
x = 90

Simplifying
x = 90