最新8.1-二元一次方程组--(1)课件ppt.ppt

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1、8.1-二元一次方程组--(1)含有一个未知数，并且未知数的次数是1系数不等于0的方程叫做一元一次方程。方程ax+b=0(a≠0）叫做一元一次方程的标准形式。使方程左、右两边的未知数的值相等的未知数的值，叫做方程的解。你知道篮球比赛胜负排名的规则吗？课堂练习：请判断下列各方程中，哪些是二元一次方程，哪些不是？并说明理由。(1)2x+5y=10(2)2x+y+z=1(5)2a+3b=5(6)2x+10xy=0(3)x+y=202(4)x+2x+1=02m.leju.com/touch/house/zhuhai/139292/m.leju.com/t

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