若x,y,z满足3x+7y+z=1和4x+10y+z=200,则x+3y分之2000x+2000y+2000z的值为?
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若x,y,z满足3x+7y+z=1和4x+10y+z=200,则x+3y分之2000x+2000y+2000z的值为?若x,y,z满足3x+7y+z=1和4x+10y+z=200,则x+3y分之200
若x,y,z满足3x+7y+z=1和4x+10y+z=200,则x+3y分之2000x+2000y+2000z的值为?
若x,y,z满足3x+7y+z=1和4x+10y+z=200,则x+3y分之2000x+2000y+2000z的值为?
若x,y,z满足3x+7y+z=1和4x+10y+z=200,则x+3y分之2000x+2000y+2000z的值为?
把3x+7y+z=1看成(1),4x+10y+z=200看成(2),(2)-(1)=x+3y=199.在(2)中可把等式看成x+y+z+3x+9y=200.由上得:x+y+z=-397.代入原式=…=-794000/199
若x,y,z满足3x+7y+z=1和4x+10y+z=200,则x+3y分之2000x+2000y+2000z的值为?
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