1.-8x(-2)^4-(-1/2)^2x(-2)^4+4/9x(-3)^2
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1.-8x(-2)^4-(-1/2)^2x(-2)^4+4/9x(-3)^2
2.(-3)^2÷二又1/4x(-2/3)+4+2^2x(-8/3)
3.解方程2x-1/4=2/3x-2
4.2x+1/3-5x-1/6=1
5.已知X:Y:Z=1:2:3
(1)若X+Y+Z=54,求X,Y,Z的值
(2)若2X+3Y=7,求单项式-1.3XYZ的值
最好有过程..
2.(-3)^2÷二又1/4x(-2/3)+4+2^2x(-8/3)
3.解方程2x-1/4=2/3x-2
4.2x+1/3-5x-1/6=1
5.已知X:Y:Z=1:2:3
(1)若X+Y+Z=54,求X,Y,Z的值
(2)若2X+3Y=7,求单项式-1.3XYZ的值
最好有过程..
1..-8x(-2)^4-(-1/2)^2x(-2)^4+4/9x(-3)^2
=-128-1/4*16+4/81
=-128-4+4/81
=-132+4/81=-131又77/81
2 -28/3
3 -21/16
4 x=-5/18
5(1)x+2x+3x=54
6x=54
x=9
x=9,y=18,z=27
=-128-1/4*16+4/81
=-128-4+4/81
=-132+4/81=-131又77/81
2 -28/3
3 -21/16
4 x=-5/18
5(1)x+2x+3x=54
6x=54
x=9
x=9,y=18,z=27
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