SOLUTION: 1/R(total)= 1/12 + 1/15 + 1/5 R(total)=? How is this solved? Thank you

Question 200527: 1/R(total)= 1/12 + 1/15 + 1/5
R(total)=?
How is this solved?
Thank you
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
Start with the given equation.

Multiply EVERY term by the LCD to clear out the fractions.

Multiply and simplify

Combine like terms.

Divide both sides by 21 to isolate .

Rearrange the equation.

Reduce

Approximate the right side

So the total resistance is approximately 2.8571 ohms (assuming that's the unit you're working with).

If you have any questions, email me at jim_thompson5910@hotmail.com.
Check out my website if you are interested in tutoring.
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