Question

0.7x+y=340 and -0.5x+y=320 solve by substitution solve for x and y

Answer 1

x=16.67,y=328.335

Explanation:

given 0.7x+y=340 ...........(1)

-0.5x+y=320............(2)

from equation (1) -(2),

1.2x=20

x=
`(20)/(1.2)`

x=16.67

put x=16.67 in equation (2)

`-05*{16.67}`+y=320

-8.335+y=320

y=320+8.335=328.335

x=16.67,y=328.335 answer