Question

Given that
R=8x+4y

Find y when x=8 and R=30

Give your answer as an improper fraction in its simplest form.
y=

Answer quick

Answer 1

Answer:

R=8x+4y

putting values

30=8(8)+4y

30=64+4y

30-64=4y

-34=4y

-34/4=y

-17/2=y

or y=-17/2

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Answer 2

Putting,R=30, and x=8 in given equation

R=8x+4y

30=8×8+4y

30=64+4y

4y=30-64

4y= - 34

Y=-34/4

Y=-17/2

Hope it helps you