Step-by-step explanation:

1. (7 X - 3y) ×5= 147 ×5

35x-15y=735----(1)

2.(8X + 5y) ×3= 50 ×3

24x+15y=150------(2)

3. now add equation (1) and (2)

35x-15y= 735

24x+15y= 150

___________

59x =885

x=885/59

x=15

4. put the value of x in(7x-3y) =147

7×15-3y=147

105-3y=147

3y=105-147

3y= -42

y = -42/3

y= -14

5. x=15, y=-14