初一上学期代数式化简求值30道.

3个回答

  • 7(2x-1)-3(4x-1)=4(3x+2)-1

    (5y+1)+ (1-y)= (9y+1)+ (1-3y)

    [ (- 2)-4 ]=x+2

    20%+(1-20%)(320-x)=320×40%

    2(x-2)+2=x+1

    6.2(x-2)-3(4x-1)=9(1-x)

    7.11x+64-2x=100-9x

    15-(8-5x)=7x+(4-3x)

    3(x-7)-2[9-4(2-x)]=22

    3/2[2/3(1/4x-1)-2]-x=2

    5x+1-2x=3x-2

    3y-4=2y+1

    87X*13=5

    7Z/93=41

    15X+863-65X=54

    (-9)+(-13)

    (-12)+27

    (-28)+(-34)

    67+(-92)

    (-27.8)+43.9

    (-23)+7+(-152)+65

    |+6(-7)|

    (-5)+|―9|

    38+(-22)+(+62)+(-78)

    (-8)+(-10)+2+(-1)

    (-4)+0+(+6)+(-1)+(-8)

    (-8)+47+18+(-27)

    (-5)+21+(-95)+29

    (-8.25)+8.25+(-0.25)+(-5.75)+(-7.5)

    6+(-7)+(9)+2

    (x3-4x2y+5xy2-3y3)-(-2xy2-4x3+x2y);

    一个多项式减去3a4-a3+2a-1得5a4+3a2-7a+2,求这个多项式.

    (2x2-x-1)-(x2-x- )+3(x2-1 ),其中x=1 .

    -9(x-2)-y(x-5)

    (1)化简整个式子.

    (2)当x=5时,求y的解.

    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.

    62g+62(g+b)-b

    (1)化简整个式子.

    (2)当g=5/7时,求b的解.

    3(x+y)-5(4+x)+2y

    (1)化简整个式子.

    (2)当x=7时,y=-4.

    (x+y)(x-y)

    (1)化简整个式子.

    (2)当a=4时,b=-2.

    2ab+a×a-b

    (1)化简整个式子.

    (2)当x=5时,y=-2.

    5.6x+4(x+y)-y

    (1)化简整个式子.

    (2)当x=5时,y=-2.

    6.4(x+2.9)-y+2(x-y)

    (1)化简整个式子.

    (2)当x=5时,y=2.

    (2.5+x)(5.2+y)

    (1)化简整个式子.

    (2)当x=5时,y=2.

    xy+3x-3(x+Y)

    (1)化简整个式子.

    (2)当x=5时,求y的解.

    3(x+y)+2(x-y)+3xy

    (1)化简整个式子.

    (2)当x=5时,求y的解.

    x+y-3(x-y)

    (1)化简整个式子.

    (2)当x=5时,y=2.