(1)设奶糖有X块
X÷9/20=X÷1/4-16
X=9
(2)设这箱水果重X千克
X*77/158+7/8=X
(1-77/158)X=7/8
X=553/324
(3)(3/8+3/8-5/12)÷3/20=20/9
(4)设原来有X吨
12+(X-12)*3/5+12+2=X
2/5X=94/5
X=47
(5)设全本书有X页
25+1/4X+62=X
X=116
则前两天看了25+1/4*116=54页.第三天要从55页看起.
(1)设奶糖有X块
X÷9/20=X÷1/4-16
X=9
(2)设这箱水果重X千克
X*77/158+7/8=X
(1-77/158)X=7/8
X=553/324
(3)(3/8+3/8-5/12)÷3/20=20/9
(4)设原来有X吨
12+(X-12)*3/5+12+2=X
2/5X=94/5
X=47
(5)设全本书有X页
25+1/4X+62=X
X=116
则前两天看了25+1/4*116=54页.第三天要从55页看起.