SOLUTION: I need help. During problem using the elimination method, we came down to 3x - 2(-170/19)= 40. Their answer for x was x= 140/19. How did they get this? I got x=220/30. Please

Algebra ->  Coordinate Systems and Linear Equations -> SOLUTION: I need help. During problem using the elimination method, we came down to 3x - 2(-170/19)= 40. Their answer for x was x= 140/19. How did they get this? I got x=220/30. Please       Log On


   



Question 182523: I need help. During problem using the elimination method, we came down to
3x - 2(-170/19)= 40. Their answer for x was x= 140/19. How did they get this? I got x=220/30. Please walk me thru each step.

Answer by Mathtut(3670) About Me  (Show Source):
You can put this solution on YOUR website!
3x - 2(-170/19)= 40
:
3x+(340/19)=40..........distributed -2(-170/19) which equals +340/19
:
3x=(760/19)-(340/19)........40=(760/19)..and subtracted (340/19)from both sides
:
3x=420/19...performed operation on right side
:
x=420/19(3)......divided both sides by 3 to isolate x
:
x=140cross%28420%29%2F%2819%2Across%283%29%29
:
x=140%2F19