七年级化简求值练习题-搜答案-智慧作业帮

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7(2x-1)-3(4x-1)=4(3x+2)-1(5y+1)+(1-y)=(9y+1)+(1-3y)[(-2)-4]=x+220%+(1-20%)(320-x)=320×40%2(x-2)+2=x+

有图来图,没图打字再问：y有两个大题再问：再问：再问：再问：vi,vii再答：我和你同级，说是哪本哪页再答：这是什么辅导书再问：全品92再答：我先回答viWouldlikewant再答：Bottles

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-详细的追加分1)66x+17y=396725x+y=1200答案：x=48y=47(2)18x+23y=230374x-y=1998答案：x=27y=79(3)44x+90y=7796

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x(x-1)-(x²-y)=-4化简得:x-y=4(x²+y²)/2–xy=1/2(x²+y²-2xy)=1/2(x-y)²因为x-y=4所

有理数的减法有理数的加减混合运算和有理数的乘法练习题及答案

3.3ab-4ab+8ab-7ab+ab=______.4.7x-(5x-5y)-y=______.5.23a3bc2-15ab2c+8abc-24a3bc2-8abc=______.6.-7x2+6

、-9(x-2)-y(x-5)（1）化简整个式子.（2）当x=5时,求y的解.2、5(9+a)×b-5(5+b)×a（1）化简整个式子.（2）当a=5/7时,求式子的值.3、62g+62(g+b)-b

1、原式=4x^2-2x^2-x+1+2-x^2-3x=x^2-4x+3=(x-1)(x-3)=(-1/2-1)(-1/2-3)=(-3/2)(-7/2)=21/42、原式=15a^2b-5ab^2-

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题?再问：恩

设a>b>0,a^2+b^2=6ab,则(a+b)/(b-a)的值等于?a^2+b^2=6ab(a+b)^2=8ab(a-b)^2=4aba>b>0a+b=√8aba-b=√4abb-a=-√4ab(

化简求值：3ab-4ab8ab-7abab=______.7x-(5x-5y)-y=______.23a3bc2-15ab2c8abc-24a3bc2-8abc=______.-7x26x13x2-4

3．3ab-4ab+8ab-7ab+ab=______．4．7x-(5x-5y)-y=______．5．23a3bc2-15ab2c+8abc-24a3bc2-8abc=______．6．-7x2+6

可以从百度文库中搜七年级上册解方程有理数计算化简求职练习题大全

．3ab-4ab+8ab-7ab+ab=______．4．7x-(5x-5y)-y=______．5．23a3bc2-15ab2c+8abc-24a3bc2-8abc=______．6．-7x2+6x

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