Question

R = 9 x + 8 y Find x when y = 8 and R = 4 Give your answer as an improper fraction in its simplest form

Answer 1

R=9x+8y

4 = 9x + 8(8)

4 = 9x + 64

4 - 64= 9x

- 60 = 9x

X= - 60/9

X= - 20/3