`y xx 9 +y xx 7 - y : 4 = 19843`
`=> y xx 9 +y xx 7 - y xx 1/4 = 19843`
`=> y xx ( 9+7- 1/4) = 19843`
`=>y xx 15,75 = 19843`
`=> y=19843 : 15,75`
`=> x=79372/63`
tìm y
a) ( y + 2/9 ) : 7/4 = 11/7
b) y x 9 + y x 5 = 70
Câu 10 tìm y
Y x 7 + y x 3 = 70 18 : y + 12 : y = 3
Câu 11 tính bằng cách thuận tiện
A 9 x 365 + 2 x 365 - 365
B 108 : 9 - 18 : 9
C 43 x 95 + 4 x 43 + 43
y - 7/10 = 4/5 : 2 y x 4/9 = 3/8 x 4
Y x 8/9 + Y x 4/7 = 2/3
( Đáp án thôi )
y x 18/5 - y x 3/5 =...
4/6 + 7/13 + 17/9 + 19/13 - 8/9 + 14/6
bài 1: Tính
a} 5/12 + 1/3 x 3/5 =
B 7/5 - 4/9 : 2/5 =
C 2/5 x 1/4 : 2/5 =
bài 2: Tìm y
a 42/25 : y/5 = 5/6
b 27/y : 9/4 = 3/7
1.tìm y.giải ra
a) y + 3/7 x 21/9 = 5
b) y x 3/5 - 1/2 = 4/5
c)9/8 - y + 2/5 = 1/4
d) y - 6/5 : 2/3 = 5/6
e) y : 7/8 + 3/4 = 7/4
giúp mk,mai đi hok thêm mk nộp!!!
TÌM X/Y BIẾT
A .X/Y x 3/4 =5/6+1/3 =?????
B.7/ 9 : X/Y =10/7-13/14
a.\(\dfrac{x}{y}\) x \(\dfrac{3}{4}\) = \(\dfrac{5}{6}\) + \(\dfrac{1}{3}\)
b.\(\dfrac{7}{9}:\dfrac{x}{y}=\dfrac{10}{7}-\dfrac{13}{14}\)
