Question

6y-5/2y=7/9
2-9z/17-4z=4/5

Answer 1

Answer:

whether the whole denominator is divisor or individually 17 in 2nd equation?

Answer 2

Step-by-step explanation:

Solution: (i) (6y−5)/2y = 7/9

By cross multiplication,

9(6y – 5) = 7 × 2y

=> 54y – 45 = 14y

=> 54y – 14y = 45

=> 40y = 45

=> y = 45/40 = 9/8

Hence y = 9/8.

(ii) (2−9z)/(17−4z) = 4/5

By cross multiplication,

5 (2 – 9z) = 4(17 – 4z)

=> 10 – 45z = 68 – 16z

=> – 45z + 16z = 68 – 10

=> – 29z = 58

=> z = – 58/29 = – 2

Hence z = – 2.