Answer: n=-2, r=2, y=-2
Step-by-step explanation: -6n-2n=16: -8n=16: n=-2, r+8r-2=16: 9r-2=16: 9r=16+2: 9r=18: r=2, -5(6y+6)=30: 6y+6=-6: 6y=-6-6: 6y=-12: y=-2
