Question

A) 15 B 24
C) 18
D) 22.5
x + 5y = 9 and 5x + 3y = 7 then what is the value of x + y?​

Answer 1

Step-by-step explanation:

x+5y=9

x=9-5y ——1

5x+3y=7 ——2

Substitute equation 1 in 2

5(9-5y)+3y=7

45-25y+3y=7

45-22y =7

-22y=7-45

-22y= -38

y=-38÷-22

=19÷11

y =1.72 ——3

substitute y in equation 1

x=9-5(1.72)

=0.4

x+y= 1.72+0.4

2.12