algebra
posted by Jackie on .
solve by elimination
2r5s =22
5r+2s = 32

2r  5s = 22
5r + 2s = 32
Multiply 1st Eq by 5 and 2nd Eq by 2.
10r  25s = 160
10r 4s = 64
Add the 2 Eq
29s = 174
5 = 6
Substitute 6 for s in original Eq
and solve rfor r.
2r  5*6 = 22
2r = 22 + 30 = 8
r = 4.