Toán Lớp 5: Tìm x, biết :
a) 9/1-X : 2 = 3
b) X/9=8/5
c) X-1/3=7/5
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Toán Lớp 5: Tìm x, biết :
a) 9/1-X : 2 = 3
b) X/9=8/5
c) X-1/3=7/5
Comments ( 2 )
Lời giải và giải thích chi tiết:
a)
9/1 $-X:2=3$
$9-X:2=3$
$X:2=9-3$
$X=6$ x $2$
$X=12$
b)
X/9= 8/5
$X=$ 8/5 x $9$
$X=$ (72)/5
$X=14,4$
c)
$X-$ 1/3 = 7/5
$X=$ 7/5 + 1/3
$X=$ (21)/(15) + 5/(15)
$X=$ (26)/(15)
color{red}\text{#minhlong86496}
9/1-X : 2 = 3
X : 2 = 9/1- 3
X : 2 = 6
x = 6 . 2
x = 12
1.
X/9=8/5
x : 9 = 1,6
x = 1,6 . 9
x = 14,4
2.
X/9=8/5
x = 8/5 . 9
x = 14,4
X-1/3=7/5
x = 7/5 + 1/3
x = 26/15