bai 1: tim x
a,4800 : ( X x 16 ) =25 b,2009 : ( 71 : x )= 2009
bai 1: tim x a,4800 : ( X x 16 ) =25 b,2009 : ( 71 : x )= 2009
By Everleigh
By Everleigh
bai 1: tim x
a,4800 : ( X x 16 ) =25 b,2009 : ( 71 : x )= 2009
A) 4800 :(x*16)=25
x*16=4800:25
x*16=192
x= 192:16
x= 12
B). 2009:(71:x)=2009
71:x. = 2009:2009
71:x. =1
X. = 71:1
x =71
$a)4800:(x×16)=25$
$x×16=4800:25$
$x×16=192$
$x=192:16$
$x=12$
$b)2009:(71:x)=2009$
$71:x=2009:2009$
$71:x=1$
$x=71×1$
$x=71$
$Cho$ $mk$
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