SOLUTION: Find R: 1/R= 1/3 +1/4

Algebra ->  Linear-equations -> SOLUTION: Find R: 1/R= 1/3 +1/4      Log On


   

Question 648242: Find R:
1/R= 1/3 +1/4
Found 2 solutions by jim_thompson5910, MathLover1:
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
1/R= 1/3 +1/4

1/R = 4/12 + 3/12

1/R = 7/12

R/1 = 12/7

R = 12/7

Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

1%2FR=+1%2F3+%2B1%2F4
1%2FR=+%281%2A4+%2B1%2A3%29%2F%283%2A4%29
1%2FR=+%284+%2B3%29%2F12
1%2FR=+7%2F12...cross multiply
1%2A12=+7%2AR
12%2F7=+R