Question 250134
an ordered pair means the two solutions are arranged (r,s)
5r-7s=-28
7r+5s=94
"by elimination" means that we combine the two equations in such a way that one of the terms ( r or s) is eliminated.
That can be by addition, subtraction, mulitplication or division of the two equations.
if we multiply the first by 5 and the second by 7 we can add them and eliminate s

5r-7s=-28
7r+5s=94
25r-35s=-28*5
49r+35s=94*7
add them
74r=-28*5+94*7
multiply out and add 
then divide both sides by 74 to get r
then take that solved r and plug it into ANY of the equations to get s