二元一次方程式....－貨運百科

標題:

二元一次方程式....

發問:

1)The computer club of a secondary school has 38 members. If there are 6 more male members than female members, how many male and female members are there in the computer club?2)The figures on the right show a square and a rectangle. If their perimeters are equal,find:a) the values of X and Yb) the areas of the... 顯示更多 1)The computer club of a secondary school has 38 members. If there are 6 more male members than female members, how many male and female members are there in the computer club? 2)The figures on the right show a square and a rectangle. If their perimeters are equal,find: a) the values of X and Y b) the areas of the square and the rectangle respectively

最佳解答:

(1) Let the no. of male and female members be x and y repectively. x + y = 38 ... eqn 1 x - y = 6 ... eqn 2 Adding eqn 1 and eqn 2, we have 2x = 44 x = 22 Sub x=22 into eqn 1 22 + y = 38 y = 16 Therefore, there are 22 male and 16 female members in the computer club (2) No figure

其他解答:

1) let x= the no. of male in the computer club y=the no. of female in the computer club x+y=38 (1) x=y+6 (2) sub (2) into (1) ........................ ........................ ......................... y=16 sub y=16 into (2) ..................... ................... x=22 2) (is there any mare imformation in the figure?) (steps 自己做la maths 是要做得多才好的)|||||let no. of female= y, no. of male= x (1) x= y+6 (2) x + y = 38 put (1) into ( 2) y+ y+6 = 38 2y = 32 y= 16 2) 資料不足