3+7x=75+x

Solution for 3+7x=75+x equation:

Simplifying
3 + 7x = 75 + x

Solving
3 + 7x = 75 + 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.
3 + 7x + -1x = 75 + x + -1x

Combine like terms: 7x + -1x = 6x
3 + 6x = 75 + x + -1x

Combine like terms: x + -1x = 0
3 + 6x = 75 + 0
3 + 6x = 75

Add '-3' to each side of the equation.
3 + -3 + 6x = 75 + -3

Combine like terms: 3 + -3 = 0
0 + 6x = 75 + -3
6x = 75 + -3

Combine like terms: 75 + -3 = 72
6x = 72

Divide each side by '6'.
x = 12

Simplifying
x = 12