Question 907552
x+y=170,
5*x+3*y=650
x=170-y
5*(170-y)+3*y=650
850-5y+3*y=650
-2*y=-200
y=100
x=170-y
x=70 at 5 and  y=100 at 3
check
70+100=170
5*x+3*y=650
5*70+3*100=650
350+300=650
650=650
ok