Answer: x= 5
Step-by-step explanation:
4x+2x=x+x+20
Collect like terms to a side.
4x+2x-x-x=20
Note, the sign in front of x changes from positive to negative because the x crosses the equal sign
4x+2x-2x=20
4x=20
Divide both side by the coefficient of x
X=5
