SOLUTION: Given the formula 1/RT=1/R1+1/R2+R3 for the resistance of a circuit, determine the resistance R2 if R1 = 5 ohms, RT = 2 ohms and R3= 3 ohms. PLEASE VERY CONFUSED, HAVE NO ID

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Given the formula 1/RT=1/R1+1/R2+R3 for the resistance of a circuit, determine the resistance R2 if R1 = 5 ohms, RT = 2 ohms and R3= 3 ohms. PLEASE VERY CONFUSED, HAVE NO ID      Log On


   

Question 94999: Given the formula 1/RT=1/R1+1/R2+R3 for the resistance of a circuit, determine the resistance R2 if R1 = 5 ohms, RT = 2 ohms and R3= 3 ohms.


PLEASE VERY CONFUSED, HAVE NO IDEA, STEP BY STEP PLEASE, I NEED TO LEARN THIS. . . THANK YOU FOR THE REVIEW.
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
1/(R2+R3)=1/RT-1/R1 ... 1/(R2+R3)=1/2-1/5 ... LCD is 10 ... 1/(R2+R3)=5/10-2/10=3/10

R2+3=10/3 ... 3R2+9=10 ... 3R2=1 ... R2=1/3