(45 - y)+18=58 (y-35)+12=32 56-(x+12)=24 55-(x-15)=30 45-y=58-18 y-35=32-12 x+12=56-24 x-15=55-30 45-y=40 y-35=20 x+12=32 x-15=25 y=45-40 y=35+20 x=32-12 x=15+25 y=5 y=55 x=20 x=40