find the voltage across each resistor in series.

Question

E=15v
There are three resistors:
R, 2R, 4R
Note: R is the lowest value and all others are multiples of that value as indicated.
Note to anyone who is doing this question: there was NO picture given

Answer 1

total resistance is 7R
so, the voltage drop across each resistor is
15(R/7R) = 15/7
15(2R/7R) = 30/7
15(4R/7R) = 120/7
Note that the total voltage drop across the circuit is 15V. Each resistor gets its share of the whole 7R ohms

Answer 2

I = E/7R = 15/7R.

V1 = I*R = 15/7R * R = 15/7 = 2.14 Volts.
V2 = I*2R = 15/7R * 2R = 30/7 = 4.29 Volts.
V3 = I*4R = 15/7R * 4R = 60/7 = 8.57 Volts.