解方程:x-15%x=34 x+120%z=180 40%x=60 70%x-45%x=100 1/4x+20%x=9
来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/07/13 21:18:17
解方程:x-15%x=34 x+120%z=180 40%x=60 70%x-45%x=100 1/4x+20%x=9 30%x=9 70%x-55%x=180 x+40%x=420
x-15%x=34
x=40
x+120%z=180
(题目有误,请审核原题)
40%x=60
X=150
70%x-45%x=100
X=400
1/4x+20%x=9
X=20
30%x=9
X=30
70%x-55%x=180
X=1200
x+40%x=420
X=300
再问: 哦,那个打错了,是x 再问几道 (2/3+5/7-1/2)÷1/42 (7/8-5/6)÷(7/12-1/4) 10/27×9/8-(17/20-3/5)
再答: (2/3+5/7-1/2)÷1/42 =(2/3+5/7-1/2) ×42 =2/3×42+5/7×42-1/2×42 =28+30-21 =37 (7/8-5/6)÷(7/12-1/4) =2/48÷1/3 =1/24×3 =1/8 10/27×9/8-(17/20-3/5) =5/12-17/20+3/5 =1/6
x=40
x+120%z=180
(题目有误,请审核原题)
40%x=60
X=150
70%x-45%x=100
X=400
1/4x+20%x=9
X=20
30%x=9
X=30
70%x-55%x=180
X=1200
x+40%x=420
X=300
再问: 哦,那个打错了,是x 再问几道 (2/3+5/7-1/2)÷1/42 (7/8-5/6)÷(7/12-1/4) 10/27×9/8-(17/20-3/5)
再答: (2/3+5/7-1/2)÷1/42 =(2/3+5/7-1/2) ×42 =2/3×42+5/7×42-1/2×42 =28+30-21 =37 (7/8-5/6)÷(7/12-1/4) =2/48÷1/3 =1/24×3 =1/8 10/27×9/8-(17/20-3/5) =5/12-17/20+3/5 =1/6
解方程:x-15%x=34 x+120%z=180 40%x=60 70%x-45%x=100 1/4x+20%x=9
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