求各位大神帮忙
1个回答
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1。 (1/2){(5/3)[(6/5)(x/3+2)-(12/5)x]+4}=x-2
(5/3)[(2/5)x+(3/5)-(12/5)x]+4=2x-4
(2/3)x+1-4x+4=2x-4
(2/3)x-4x-2x=-4-1-4
-(16/3)x=-9
x=27/16.
2。 (1/2){1+(1/3)[-2+(1/4)(3+x)]}=1
1+(1/3)[-2+(3/4)+(1/4)x]=2
1-2/3+1/4+(1/12)x=2
(1/12)x=2-1+2/3-1/4
(1/12)x=17/12
x=17.
(5/3)[(2/5)x+(3/5)-(12/5)x]+4=2x-4
(2/3)x+1-4x+4=2x-4
(2/3)x-4x-2x=-4-1-4
-(16/3)x=-9
x=27/16.
2。 (1/2){1+(1/3)[-2+(1/4)(3+x)]}=1
1+(1/3)[-2+(3/4)+(1/4)x]=2
1-2/3+1/4+(1/12)x=2
(1/12)x=2-1+2/3-1/4
(1/12)x=17/12
x=17.
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