Question 52229
Please don't feel like a big dummy.  Nobody was born knowing algebra! 
50+5x = 120+3x
50+5x-3x=120+3x-3x
50+(5-3)x=120+0
50+2x=120
-50+50+2x=120-50
0+2x=70
2x=70
2x/2=70/2
x=35