4x+6-21x=91

Solution for 4x+6-21x=91 equation:

Simplifying
4x + 6 + -21x = 91

Reorder the terms:
6 + 4x + -21x = 91

Combine like terms: 4x + -21x = -17x
6 + -17x = 91

Solving
6 + -17x = 91

Solving for variable 'x'.

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

Add '-6' to each side of the equation.
6 + -6 + -17x = 91 + -6

Combine like terms: 6 + -6 = 0
0 + -17x = 91 + -6
-17x = 91 + -6

Combine like terms: 91 + -6 = 85
-17x = 85

Divide each side by '-17'.
x = -5

Simplifying
x = -5