\(\dfrac{x}{28}\) = \(\dfrac{-4}{7}\)
=>x. 7 = -4.28
=> x.7=-112
=> x=-112:7
=> x= -16
\(\dfrac{x}{28}=\dfrac{-4}{7}\)
⇔ \(7.x=-4.28\)
⇔ \(7x=-112\)
⇔ \(x=\dfrac{-112}{7}\)
⇔ \(x=-16\)
\(28^x:7^x-4=60\)\(28^x:7^x-4=60\)
a) 4/7.|x|+1/28=12/28
b) (2)^2x-1=8
a) 4/7.|x|+1/28=12/28
b)16/2/7:(-3/5)-26/2/7:(-/5)
Câu b 16/2/7 và 26/2/7 là hỗn số nha
Thanks
x/28=-4/7
Giúp mik nha
Tìm x
a) (3x-24).73 = 2.74
b) x-[ 42 + ( -28)]= -8
c) l x-3 l = l 5 l + l -7
d) 4- ( 7- x) = x - (13-4)
bài 2: tìm x biết
a) ( x + 1 ).( 3 - x ) > 0
b) ( 4x - 3 ).( 5 - x ) < 0
c) 3/( x - 4 ).( x - 7 ) + 6/( x - 7 ).( x - 13 ) + 15/( x - 13 ).( x - 28 ) - 1/( x - 28 ) = -5/2
ai làm nhanh mk tk cho 3 cái
Tìm x biết :
a) | 45 + x | + x = -15
b) | x + 2 | - 6x = 1
c ) | x - 3 | + | x + 3 | = 7
d) 3 | 4 x - 1 | - 2 = 19
e) x - 28 - 124 / 2011 + x -1 24 - 2014 / 28 + x - 2014 - 28 / 124 = 3
TÌM X
\(\frac{x}{\left(-28\right)}=\frac{4}{7}\)
1 tim cac so nguyen x,y biet x/7=6/21 -5/y=20/28 1/2=x/12 x/8=-28/32 3/y=12/24 3/4=15/y 2 viet 3 phan so bang phan so -10/15
