Question

Given that
R=6x+5y
Find y when x=8 and R=20
Give your answer as an improper fraction in its simplest form.
y=
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Answer 1

Answer:

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Answer 2

R=6x+5y

20=6(8)+5y

20=48+5y

20-48=5y

-28=5y

5y=-28

y=-28/5