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用加消元:5完队论设伯查编y+z=12①6y+5z=22②①×(-5)+②-25y-5z+6y+5z=-60+祖皇矿微脸22-19y=-38y=2①×(-6)+②×5-30y-6z+30y+25z=-72+11019z=38z=2解得:y=2来自,z=2用减消元:7X+3y=44①11X-2Y=49②①×2-②×(-3初挥台)14x+6y-(-33x+6y)=88-(-147)47331215问答x=235x=5诗静胞①×11-②×777x+33y-(77x-14y)=484-34347y=141y=3解得:x=5,y=3
5y+z=12①6离黄依属失地y+5z=22②①×5-②19y=38y=2③①-②×5z=2(y,z)=(2,2)7x+3y=44①11x-2y=49②①×2+②×347x=235x=5③①-③×73y=9y象=3(x,y)=(5,3)