英语数学题(用中文解答)1.Two numbers added together make 56. A quarter of the first plus a third of the second make 16.2.A group of 7-year-olods are going to a park with a group of 11-year-olds.lf the average age of the two groups together
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![英语数学题(用中文解答)1.Two numbers added together make 56. A quarter of the first plus a third of the second make 16.2.A group of 7-year-olods are going to a park with a group of 11-year-olds.lf the average age of the two groups together](/uploads/image/z/4025995-43-5.jpg?t=%E8%8B%B1%E8%AF%AD%E6%95%B0%E5%AD%A6%E9%A2%98%28%E7%94%A8%E4%B8%AD%E6%96%87%E8%A7%A3%E7%AD%94%EF%BC%891.Two+numbers+added+together+make+56.+A+quarter+of+the+first+plus+a+third+of+the+second+make+16.2.A+group+of+7-year-olods+are+going+to+a+park+with+a+group+of+11-year-olds.lf+the+average+age+of+the+two+groups+together)
英语数学题(用中文解答)1.Two numbers added together make 56. A quarter of the first plus a third of the second make 16.2.A group of 7-year-olods are going to a park with a group of 11-year-olds.lf the average age of the two groups together
英语数学题(用中文解答)
1.Two numbers added together make 56.
A quarter of the first plus a third of the second make 16.
2.A group of 7-year-olods are going to a park with a group of 11-year-olds.lf the average age of the two groups together is 9.4 years,how many of each age group are there?
英语数学题(用中文解答)1.Two numbers added together make 56. A quarter of the first plus a third of the second make 16.2.A group of 7-year-olods are going to a park with a group of 11-year-olds.lf the average age of the two groups together
1 设一个数为x,另一个数为y.
x+y=56
x/4+y/3=16
解得
x=32
y=24
2 设7岁x人,11岁y人.
(7x+11y)/(x+y)=9.4
解得
x=2 y=3
或x=4 y=6
x=6 y=9
……
两个数相加等于56
第一个数的四分之一加上第二数的三分之一是16
一组7岁的和一组11岁的去公园。如果平均年龄是9.4岁,每组有多少人
1. X+Y=56 X/4+Y/3=16
所以,X=32 Y=24
2. 第一组和第二组的人数比为2:3就行了
设x和y
1.x+y=56且1/4x+1/3y=16
得x=32 y=24