bài 16.Tìm x
25-x/56 = 6/16
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`(25-x)/56 = 6/16`
`=> (25-x)xx16= 56xx6`
`=> (25-x)xx16= 336`
`=> 25-x=336:16`
`=> 25-x=21`
`=>x=25-21`
`=>x=4`
Ta có :25-x/56=6/16 <=>25-x/56=3/8
Gọi 25-x là y =>y/56=3/8
=>y=56 nhân 3 chia 8 vậy y =21
tương đương 25-x=21
x=25-21=4
Vậy x=4 thì 25-x/56=6/16
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Vào trang này đi. kết quả đó
\(\frac{25-x}{56}=\frac{6}{16}\)
\(\frac{25-x}{56}=\frac{3}{8}\)
\(\frac{25-x}{56}=\frac{21}{56}\)
\(\Rightarrow25-x=21\)
\(\Rightarrow x=25-21\)
\(\Rightarrow x=4\)
Vậy x=4
=>(25-x)16=6x56=280
25-x=17.5
x=7.5=15/2
vậy x=15/2
Theo đề ta có: \(\frac{25-x}{56}=\frac{6}{16}\)
Ta rút gọn: \(\frac{25-x}{56}=\frac{3}{8}\)
\(\Leftrightarrow\)25 -x . 8 = 56 . 3
\(\Rightarrow\)25 - x . 8 = 168
\(\Rightarrow\)25 - x = 168 : 8
\(\Rightarrow\)25 - x = 21
\(\Rightarrow\) - x = 21 - 25
\(\Rightarrow\) - x = -4
\(\Rightarrow\) x = 4
Vậy x = 4.
\(\frac{25-x}{56}=\frac{6}{16}\)
\(\Rightarrow\frac{25-x}{56}=\frac{3}{8}\)
\(\Rightarrow\left(25-x\right).8=56.3\)
\(\Rightarrow25.8-8x=168\)
\(\Rightarrow200-8x=168\)
\(\Rightarrow8x=200-168\)
\(\Rightarrow8x=32\)
\(\Rightarrow x=32:8\)
\(\Rightarrow x=4\)
Tham khảo nha !!!
Cách này dễ hơn nèk :
\(\frac{25-x}{56}=\frac{6}{16}\)
\(\Leftrightarrow\)\(\frac{25-x}{56}=\frac{3}{8}\)
\(\Leftrightarrow\)\(\frac{25-x}{56}=\frac{21}{56}\)
\(\Leftrightarrow\)\(25-x=21\)
\(\Leftrightarrow\)\(x=25-21\)
\(\Leftrightarrow\)\(x=4\)
Vậy \(x=4\)
Chúc bạn học tốt ~
\(25-\frac{x}{56}=\frac{6}{16}\)
\(\frac{x}{56}=25-\frac{6}{16}\)
\(\frac{x}{56}=24,625\)
\(x=24,625\times56\)
\(x=1379\)
25-x/56=6/16
x/56=25-6/16
x/56=24.526
x=24.625x56
x=1379
vay =1379
25-x/56=6/16
x/56=25-6/16
x/56=24\(\frac{5}{8}\)
x/56=24\(\frac{35}{56}\)
x/56=\(\frac{24\times56+35}{56}\)
x/56=\(\frac{1379}{56}\)
Vậy số cần tìm là:\(\frac{1379}{56}\)
25-\(\frac{x}{56}=\frac{6}{16}\)
\(\frac{x}{56}=25-\frac{6}{16}\)
\(\frac{x}{56}=\frac{197}{8}\)
\(\frac{x}{56}=\frac{1379}{56}\)
=>x=1379
\(\frac{25-x}{56}=\frac{6}{16}\)=> \(\frac{\left(25-x\right).2}{56}=\frac{6.7}{112}\)
vậy ( 25 - x) .2 = 6.7
( 25 - x) .2 = 42
( 25 - x) = 42 : 2
( 25 - x) = 21
-x = 21 - 25
- x = -4
x = 4
25 - x/56 = 6/16
x/56 = 25 - 6/16 = 400/16 - 6/16 = 394/16 = 197/8
x.8 = 56.197
x.8 = 11032
x = 11032 : 8 = 1379.
Bài 1:
\(101\cdot125+101\cdot25-101\cdot50\)
\(=101\cdot\left(125+25-50\right)\)
\(=101\cdot100\)
\(=10100\)
Bài 2:
\(76\cdot115+56\cdot24+59\cdot24\)
\(=76\cdot115+24\cdot\left(56+59\right)\)
\(=76\cdot115+24\cdot115\)
\(=115\cdot\left(76+24\right)\)
\(=115\cdot100\)
\(=11500\)
25 - \(\dfrac{x}{56}\) = \(\dfrac{6}{16}\)
\(\dfrac{x}{56}\) = 25 - \(\dfrac{6}{16}\)
\(\dfrac{x}{56}\) = 25 - \(\dfrac{3}{8}\)
\(\dfrac{x}{56}\) = \(\dfrac{200}{8}\) - \(\dfrac{3}{8}\)
\(\dfrac{x}{56}\) = \(\dfrac{197}{8}\)
\(x\) = \(\dfrac{197}{8}\) \(\times\)56
\(x\) = 1379