Question

1/ R - 1 3R +1/5R
find L.C.M​

Answer 1

Answer:

"1/5R + 1/2R = ? I have two way to solve, but would like to know which is the correct one. First way, 1/5R + 2.5/5R = 3.5/5R... I got the 2.5 by multiplying by 2 to keep the denominator of the equation same While 2nd method, cross multiply method. Where 2R/10R^2 + 5R/10R^2 = 7R/10R^2"

Answer 2

Step-by-step explanation:

Simple exactly how solve all fractions addition:

ab±cd=ad±bcbd

and than you can always shorten the fraction.

Here it says either:

1/5R+1/3R=R5+R3=3R+5R10=8R15=810R=8.7R

or

15R+12R=…=810R