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Solve the system of equations by elimination/addition. Give your solution as an ordered pair.
`-15 x+3 y=-78`
`-5 x+2 y=-27`
`-15 x+3 y=-78`
`-5 x+2 y=-27`
Box 1: Enter your answer as an n-tuple of numbers. Example: (2,5.5172)
Enter each value as a number (like 5, -3, 2.2172) or as a calculation (like 5/3, 2^3, 5+4)
Enter DNE for Does Not Exist, oo for Infinity
`(5,-1)`