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x÷7/5+1/5=4/5 (解方程)

X÷7/5+1/5=4/5;X÷7/5=3/5;X=3/5*7/5;X=21/25

x÷7/5+1/5=4/5 x÷7/5=4/5-1/5 x=3/5*7/5 x=21/25

x/(5/6)+1/5=4/56x/5=3/5x=1/2

X*5/7=1/5 X=1/5*5/7 X=1/7

x÷5/6+1/5=4/5 解:X÷5/6=4/5-1/5 X÷5/6=3/5 x =3/5*5/6 X=1/2

15

6/5x=3/5x=1/2

X÷7/5+1/5=4/5 解,X÷7/5=4/5-1/5 X÷7/5=3/5 X=3/5*7/5 X=21/25,等于25分之21

(1)x+ 7 9 x= 4 3 , 16 9 x= 4 3 , 16 9 x* 9 16 = 4 3 * 9 16 , x= 3 4 ;(2)x÷ 7 5 + 1 5 = 4 5 , x÷ 7 5 + 1 5 - 1 5 = 4 5 - 1 5 , x÷ 7 5 * 7 5 = 3 5 * 7 5 , x= 21 25 .

(X-7)÷5=4 X-7=4*5 X=4*5+7=27

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