1,24 +3,07 x 1,24+4,89 x1,24+6 x 1,24
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
1: \(\Leftrightarrow2x-1\in\left\{1;-1;2;-2;3;-3;4;-4;6;-6;8;-8;12;-12;24;-24\right\}\)
=>\(x\in\left\{1;0;\dfrac{3}{2};-\dfrac{1}{2};2;-1;\dfrac{5}{2};-\dfrac{3}{2};\dfrac{7}{2};-\dfrac{5}{2};\dfrac{9}{2};-\dfrac{7}{2};\dfrac{13}{2};-\dfrac{11}{2};\dfrac{25}{2};-\dfrac{23}{2}\right\}\)
2: =>x+6+9 chia hết cho x+6
=>\(x+6\in\left\{1;-1;3;-3;9;-9\right\}\)
hay \(x\in\left\{-5;-7;-3;-9;3;-15\right\}\)
3: =>2x+4+15 chia hét cho x+2
=>\(x+2\in\left\{1;-1;3;-3;5;-5;15;-15\right\}\)
=>\(x\in\left\{-1;-3;1;-5;3;-7;13;-17\right\}\)
a) 18.24 x ( 5.6 + 4.4 )
= 18.24 x 10
=182.4 .
b)2,07 x ( 88.2 + 11.8 )
= 2,07*100
= 207 .
c) = 251.7 x ( 125 - 25 )
= 251.7 x 100
= 25170 .
d) = ( 1.24 x 2 ) +99
= 2.48+99
= 101.48.
k mình nha !
a,
18,24 x 5,6 + 18,24 x 4,4
= 18,24 x ( 5,6 + 4,4 )
= 18,24 x 10
= 182,4
b,
2,07 x 88,2 + 2,07 x 11,8
= 2,07 x ( 88,2 + 11,8 )
= 2,07 x 100
= 207
c,
251,7 x 125 - 251,7 x 25
= 251,7 x ( 125 - 25 )
= 251,7 x 100
= 25100
d,
1,24 + 1,24 + 99
= 2,48 + 99
= 101,48
`2,15-x=3,05`
`x=2,15-3,05`
`x=-0,9`
Vậy `x=-0,9`
__________________
`0,12-(2x-5)=1,88`
`2x-5=0,12-1,88`
`2x-5=-1,76`
`2x=-1,76+5`
`2x=3,24`
`x=3,24:2`
`x=1,62`
Vậy `x=1,62`
__________________
`1,74-3,5:x=1,24`
`3,5:x=1,74-1,24`
`3,5:x=0,5`
`x=3,5:0,5`
`x=7`
Vậy `x=7`
2,15−x=3,052,15-x=3,05
x=2,15−3,05x=2,15-3,05
x=−0,9x=-0,9
Vậy x=−0,9x=-0,9
__________________
0,12−(2x−5)=1,880,12-(2x-5)=1,88
2x−5=0,12−1,882x-5=0,12-1,88
2x−5=−1,762x-5=-1,76
2x=−1,76+52x=-1,76+5
2x=3,242x=3,24
x=3,24:2x=3,24:2
x=1,62x=1,62
Vậy x=1,62x=1,62
__________________
1,74−3,5:x=1,241,74-3,5:x=1,24
3,5:x=1,74−1,243,5:x=1,74-1,24
3,5:x=0,53,5:x=0,5
x=3,5:0,5x=3,5:0,5
x=7x=7
Vậy x=7
a )18,24 x 5,6 + 18,24 x 4,4
= 18,24 x ( 5,6 + 4,4 )
= 18,24 x 10
= 182,4
b ) 2,07 x 88,2 + 2,07 + 11,8
= 2,07 x ( 88,2 x 11,8 )
= 2,07 x 100
= 207
c ) 251,7 x 125 - 251,7 - 25
= 251,7 x ( 125 - 25 )
= 251,7 x 100
= 25170
d) 1,24 + 1,24 x 99
= 1,24 x 1 + 1,24 x 99
= 1,24 x ( 1 + 99 )
= 1,24 x 100
= 124
\(-66\left(\dfrac{1}{2}-\dfrac{1}{3}+\dfrac{1}{11}\right)+1,24\cdot\left(-37\right)+63\cdot\left(-1,24\right)\)
\(=-66\cdot\dfrac{17}{66}+\left(-1,24\right)\cdot37+63\cdot\left(-1,24\right)\)
\(=-17+\left(1,24\right)\left(37+63\right)\)
\(=-17+\left(-1,24\right)\cdot100\)
\(=-17+\left(-124\right)\)
\(=-141\)
\(1,24+1,26=\frac{5}{2}=2,5\) k mk nha
Các bạn k mk mk k lại cho