Elimination Method...
posted by Joe .
Solve by eliminatin method.
2r5s= 11
5r+2s= 16

2r5s= 11 times 5 is 10r25s= 55
5r+2s= +16 times 2 is 10r+ 4s= +32

**********subtract*****0r 29s=87
s = 87/29
2r 5(87/29) = 11
2 r  435/29 = 11
2 r = (319+435)/29
2 r = 116/29
r = 58/29