Posted by Jennifer on .
What is the solution of the system
7r  5s = 36 and 5r + 7s = 68

Mat 116 
Reiny,
first by 7 > 49r  35s = 252
second by 5 > 25r + 35s = 340
add them
74r = 592
r = 8
sub back into one of the original equations to find s