75-(10+x)=25
25 . 15 + 75 . 45
-10 . 25 - 10 . 75 + 10 . 50
3^x-2 - 2^3 = 19
(2 x - 5)^3 = - 64
2(x-1)^2 + 3 = 35
125 - 25 (x + 3) = 50
2(x+ 3) - 1x = 4
a: =25(15+45*3)
=25*150
=3750
b: \(=-10\left(25+75-50\right)=-10\cdot50=-500\)
c: =>3^x-2=27
=>x-2=3
=>x=5
d: =>2x-5=-4
=>2x=1
=>x=1/2
e: =>2(x-1)^2=32
=>(x-1)^2=16
=>x-1=4 hoặc x-1=-4
=>x=-3 hoặc x=5
f: =>25(x+3)=75
=>x+3=3
=>x=0
tìm x : 75 : x + 25 : X = 10 giải nhanh giúp mình với
`75 xx 1/x + 25 xx 1/x = 10`
`1/x xx (75+25) = 10`
`=> 1/x xx 100 = 10`
`=> 1/x = 10/100`
`=> 1/x = 1/10`
`=> x = 10`.
`x : 75 : x + 25 : x = 10`
`x : 100 = 10`
`x = 10xx100`
`x = 1000`
Nguyễn thị kim oanh nè,bài của cậu đây.
Tính nhanh:
(75 x 625+175 x 625) : (20 x 25 x 125 - 625 x 75)
Cách làm:
(75 x 625+175 x 625) : (20 x 25 x 125 - 625 x 75)
=625 x (175+75) : (20 x 5 x 125 x 5 - 625 x 75)
=(625 x 250) : (20 x 5 x 625 - 625 x 75)
=(625 x 250 : (100 x 625 - 625 x 75)
=(625 x 250) : (625 x (100-75))
=(625 x 250) : (625 x 25)
=10
3.[25-(x-10)]-75=0
3 . [ 25 - ( x - 10 ) ] - 75 = 0
3 . [ 25 - ( x - 10 ) ] = 75
25 - ( x - 10 ) = 75 : 3
25 - ( x - 10 ) = 25
x - 10 = 25 - 25
x - 10 = 0
x = 0 + 10
x = 10
Vậy x = 10
\(3\cdot\left[25-\left(x-10\right)\right]-75=0\)
\(3\cdot\left[25-\left(x-10\right)\right]=0+75\)
\(3\cdot\left[25-\left(x-10\right)\right]=75\)
\(25-\left(x-10\right)=75:3\)
\(25-\left(x-10\right)=25\)
\(x-10=25-25\)
\(x-10=0\)
\(x=0+10\)
\(x=10\)
3 . [25 - (x - 10)] - 75 = 0
=> 3 . [25 - (x - 10)] = 0 + 75
=> 3 . [25 - (x - 10)] = 75
=> 25 - (x - 10) = 75 : 3
=> 25 - (x - 10) = 25
=> x - 10 = 25 - 25
=> x - 10 = 0
=> x = 0 + 10
=> x = 10
Vậy x = 10
Giai phương trình x+10/29+x-75/27 = x-73/25+x-2/23
tìm x : 75 : x + 25 : X = 10 giải nhanh giúp mình với
giải lại ak
\(\dfrac{1}{x}\times\left(75+25\right)=10\)
\(\dfrac{1}{x}=\dfrac{10}{75+15}=\dfrac{1}{10}\)
=> x = 10
x : 75 : x + 25 : X = 10
x :(75+25) =10
x : 100 =10
x =10x100
x =1000
tính nhanh : 10 x 20 -100 x 75 + 10 x 80 - 100 x 25
kban vs mk nha
10 . 20 - 100 . 75 + 10 . 80 + 100 . 25
= 10 . ( 20 + 80 ) - 100 . ( 75 + 25 )
= 10 . 100 - 100 . 100
= 1000 - 10000
= - 9000
10 x 20 -100 x 75 + 10 x 80 - 100 x 25
10. 10. 2 - 100. 75 + 10. 10. 8 - 100 .25
100.2 -100.75 +100.8 - 100.25
200 - 7500 + 800 - 2500
vô lý
10x20-100x75+10x80-100x25
200-7500+800-2500
-9000
\(\left|\dfrac{-25}{10}\right|\) x 0,2 + 75% : \((\dfrac{5}{2^{ }})^2\)
`|-25/10|×0,2+75%:(5/2)^2`
`=25/10×1/5+3/4:25/4`
`=5/10+3/4×4/25`
`=1/2+3/25`
`=25/50+6/50`
`=31/50`
Giúp mình với !!!
a) 25 . ( -75 + 32 ) - 75 . ( 94 - 51 )
b) ( -4 )² . ( | x + 4 | . -9 ) = ( -8 ) + ( -12 ) . ( -10 )
a) ( - 78 ) . ( 1 + 187 ) + 187 . 78
= ( - 78 ) + ( - 78 ) . 187 + 187 . 78
= ( - 78 ) + 187 . [ ( - 78 ) + 78 ]
= ( - 78 ) + 187 . 0
= ( - 78 ) + 0
= ( - 78 )
b) ( - 39 ) . 15 - 36 . 39 - 49 . ( - 39 )
= ( - 39 ) . 15 + 36 . ( - 39 ) - 49 . ( - 39 )
= ( - 39 ) . ( 15 + 36 - 49 )
= ( - 39 ) . 2
= - 78
a) (-78).(1+187) + 187.78 = -78 - 78.187 +187.78 = -78
b) (-39).15 - 36.39 - 49.(-39)
= -39.15 - 36.39 + 49.39
=39.(-15-36+49)
= 39.(-2)
= - 78
Tích mk nha !!!!~~
a) ( -78 ) . ( 1+187 ) + 187 . 78
= 78 . -(1+187) +187 . 78
=78 . -188 + 187 . 78
= 78 . ( -188 + 187 )
=78 . -1 = -78
b) ( -39 ) .15 -36 . 39 -49.(-39)
=(-39).15+36.(-39) - 49 .(-39)
=-39. ( 15+36-49)
=-39 . 2
=-78
học tốt ~~~