Question

1. Given that: x+y-z+100= 350. If x= 2y and y=2z,
then z= ?

(a) 30
(b) 50
(c) 70
(d) 90​

Answer 1

Answer:

x+y-z+100=350

4z+2z-z=250

5z=250

z=250/5

z=50