Question

x upon 7 + y upon 3 = 5, x upon 2 - y upon 9 = 6

Answer 1

x/7+y/3=5

(3x+7y)/21=5
3x+7y=5×21
3x+7y=105
3x=105-7y
x=(105-7y)/3.......1



x/2-y/9=6
(9x-2y)/18=6
9x-2y=18×6=108
9x=108-2y
x=(108-2y)/9..........2

(105-7y)/3=(108-2y)/9.............from 1 and 2
3(108-2y)=9(105-7y)
324-6y=945-63y
63y-6y=945-324
57y=621
y=621/57

i hope it will help you