What is the solution of the system
7r - 5s = 36 and 5r + 7s = 68
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
7r - 5s = 36 and 5r + 7s = 68
second by 5 --> 25r + 35s = 340
add them
74r = 592
r = 8
sub back into one of the original equations to find s