Which ordered pair open paren r comma s close paren is the solution to the given system of equations? 5 r plus 7 s is equal to 61 negative 5 r plus 7 s is equal to negative 19

Add the equations to eliminate r: (5r + 7s) + (−5r + 7s) = 61 + (−19), so 14s = 42 and s = 3. Substitute s = 3 into the first equation: 5r + 21 = 61, giving r = 8. The solution is (8, 3), choice A.

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