SOLUTION: Solve the equation: r/5 + 6/5 = r/7 + 8/7 I have no idea on how to go about this. Any and help would be greatly appreciated.

Algebra ->  Numeric Fractions Calculators, Lesson and Practice -> SOLUTION: Solve the equation: r/5 + 6/5 = r/7 + 8/7 I have no idea on how to go about this. Any and help would be greatly appreciated.      Log On


   

Question 28920: Solve the equation:
r/5 + 6/5 = r/7 + 8/7
I have no idea on how to go about this. Any and help would be greatly appreciated.
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
The least common multiple (LCM) is 35
Multiply through by the LCM to get rid of the denominators.
7r+42=5r+40
2r=-2
r=-1
Cheers,
Stan H.