6-2x+1x=-4x+18+1 x combine like terms

x = 6

Step-by-step explanation:

first of all, you should know how to do this, this is the basic level of math that students learn in 4th grade.

first you combine like terms (terms that have the same variable)

6 - 2x + 1x = - 4x + 18 + 1x

= 6 - 1x = - 3x + 18

= 6 = - 2x + 18

= - 12 = - 2x

= 6 = x