tìm x
\(\frac{56-x}{34}\)= \(\frac{144}{96}\)
giải ra cho mình nhé !
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\(\frac{56-x}{34}=\frac{144}{96}=\frac{3}{2}\)
\(\Rightarrow\left(56-x\right)2=34\cdot3=102\)
\(\Rightarrow56-x=102\div2\)
\(\Rightarrow56-x=51\)
\(\Rightarrow x=56-51\)
\(\Rightarrow x=5\)
\(56-\frac{x}{34}=\frac{144}{96}\)
\(\Rightarrow\frac{x}{34}=56-\frac{144}{96}\)
\(\Rightarrow\frac{x}{34}=\frac{109}{2}\)
\(\Rightarrow2x=109\cdot34=3706\)
\(\Rightarrow x=3706\div2\)
\(\Rightarrow x=1853\)
Ta có :
56-x/34=144/96
=> x/34=56-144/96
=> x/34=109/2
Áp dụng tích chất 2 phân số bằng nhau thì 2 tích chéo bằng nhau ta có:
x/34=109/2 <=> x.2=34.109
=> x.2 =3706
=> x =3706:2
=> x =1853
Vậy x=1853
x/34 = 56 - 144/96
x/34 = 109/2
x/34 = 1853/34
=> x = 1853
\(\frac{x-144}{10}+\frac{x-130}{12}+\frac{x-112}{14}+\frac{x-106}{16}+\frac{x-96}{17}=15\)
\(\Leftrightarrow\)\(\frac{x-144}{10}-1+\frac{x-130}{12}-2+\frac{x-112}{14}-3+\frac{x-106}{16}-4+\frac{x-96}{17}-5=0\)
\(\Leftrightarrow\)\(\frac{x-154}{10}+\frac{x-154}{12}+\frac{x-154}{14}+\frac{x-154}{16}+\frac{x-154}{17}=0\)
\(\Leftrightarrow\)\(\left(x-154\right)\left(\frac{1}{10}+\frac{1}{12}+\frac{1}{14}+\frac{1}{16}+\frac{1}{17}\right)=0\)
\(\Leftrightarrow\)\(x-154=0\) (do 1/10 + 1/12 + 1/14 + 1/16 + 1/17 khác 0)
\(\Leftrightarrow\)\(x=154\)
Vậy...
\(\frac{3}{34}+\frac{34}{34}.\frac{3}{4}=\frac{3}{34}+1.\frac{3}{4}=\frac{3}{34}+\frac{3}{4}=\frac{57}{68}\)
\(\frac{23}{3}.\frac{56}{6}+\frac{86}{78}=\frac{23}{3}.\frac{28}{3}+\frac{43}{39}=\frac{644}{9}+\frac{28}{3}=\frac{728}{9}\)
\(\frac{3}{45}:\frac{1}{4}=\frac{1}{15}.4=\frac{4}{15}\)
\(\frac{5}{34}-\frac{3}{6}=\frac{5}{34}-\frac{1}{2}=\frac{3}{4}\)
oh my god!!!mk mới lp 6 nên ko giải đc....khó wá!
meo meo!
#adinamoto#
ta có: \(\frac{x}{3}=\frac{y}{4}=k\Rightarrow\hept{\begin{cases}x=3k\\y=4k\end{cases}}\)
mà xy = 144 => 3k.4k = 144
12k2 = 144
k2 = 12
=> \(k=\sqrt{12}\) hoặc \(k=-\sqrt{12}\)
=> x = 3k = \(3.\sqrt{12}\) ....
...
bn tự lm típ nha
\(\frac{56-x}{34}=\frac{144}{96}\)
\(=\frac{56-x}{34}=\frac{3}{2}\)
\(=\frac{56-x}{34}=\frac{51}{34}\)
\(\Rightarrow56-x=51\)
\(=-x=51-56\)
\(\Rightarrow x=5\)
x bang 2