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) 10/ 7 − y · 4 3 = 5 1
y · 4 3 = 10 7 − 5 1
y · 4 3 = 2 1 y = 2 1 : 4 3
y = 2 1 · 3 4
y = 3 2
\(x\times2+x\times0,5=10\)
\(\Rightarrow x\times\left(2+0,5\right)=10\)
\(\Rightarrow x\times2,5=10\)
\(\Rightarrow x=10\div2,5\)
\(\Rightarrow x=4\)
Vậy x = 4
\(\frac{4}{7}+\frac{3}{7}\div x=\frac{3}{2}\)
\(\Rightarrow\frac{3}{7}\div x=\frac{3}{2}-\frac{4}{7}\)
\(\Rightarrow\frac{3}{7}\div x=\frac{21}{14}-\frac{8}{14}\)
\(\Rightarrow\frac{3}{7}\div x=\frac{13}{14}\)
\(\Rightarrow x=\frac{3}{7}\div\frac{13}{14}\)
\(\Rightarrow x=\frac{3}{7}\cdot\frac{14}{13}=\frac{6}{13}\)
Vậy x = \(\frac{6}{13}\)
x.2+x.0,5=10
=> x= . (2+0,5)=10
=>x.2,5=10
=>x= 10:2,5
=>x=4
vậy x = 4
b)
\(\frac{4}{7}\)+\(\frac{3}{7}\):x=\(\frac{3}{2}\)
=> \(\frac{3}{7}\):x= \(\frac{3}{2}\):\(\frac{4}{7}\)
=> \(\frac{3}{7}\):x=\(\frac{13}{14}\)
=> \(\frac{3}{7}\):x=\(\frac{3}{7}\):\(\frac{14}{13}\)
=> x =\(\frac{6}{13}\)
vậy x =\(\frac{6}{13}\)
hok tốt
1 nha
chúc bạn học tốt
click cho mình xin 1 điểm hỏi đáp
ok
\(\frac{1}{2}\)x \(\frac{9}{10}\)+ \(\frac{8}{10}\)+ \(\frac{2}{4}\)+ \(\frac{3}{10}\)x \(0,5\)
= \(0,5\)x \(0,9\)+ \(0,8\)+ \(0,5\)x \(0,5\)
\(=0,45\)x \(1,3\)x \(0,5\)
\(=0,45\)x \(0,65=0,2925\)
\(\left(\frac{5}{7}-y\right)x\frac{14}{5}=\frac{7}{10}+\frac{1}{2}\)
\(\left(\frac{5}{7}-y\right)x\frac{14}{5}=\frac{6}{5}\)
\(\frac{5}{7}-y=\frac{6}{5}:\frac{14}{5}\)
\(\frac{5}{7}-y=\frac{3}{7}\)
Y = \(\frac{5}{7}-\frac{3}{7}\)
Y = \(\frac{2}{7}\)
\(\left(\frac{5}{7}-y\right).\frac{14}{5}=\frac{7}{10}+\frac{1}{2}\)
\(\left(\frac{5}{7}-y\right).\frac{14}{5}=\frac{6}{5}\)
\(\frac{5}{7}-y=\frac{6}{5}\div\frac{14}{5}\)
\(\frac{5}{7}-y=\frac{3}{7}\)
\(y=\frac{5}{7}-\frac{3}{7}\)
\(y=\frac{2}{7}\)
(\(\frac{5}{7}-y\)) x \(\frac{14}{5}=\frac{6}{5}\)
\(\frac{5}{7}-y\) = \(\frac{6}{5}:\frac{14}{5}\)
\(\frac{5}{7}-y\) = \(\frac{3}{7}\)
y = \(\frac{5}{7}-\frac{3}{7}\)
y = \(\frac{2}{7}\)
\(\left(\frac{5}{7}-y\right)\cdot\frac{14}{5}=\frac{7}{10}+\frac{1}{2}\)
\(\Leftrightarrow\left(\frac{5}{7}-y\right)\cdot\frac{14}{5}=\frac{7}{10}+\frac{5}{10}\)
\(\Leftrightarrow\left(\frac{5}{7}-y\right)\cdot\frac{14}{5}=\frac{6}{5}\)
\(\Leftrightarrow\frac{5}{7}-y=\frac{6}{5}\div\frac{14}{5}\)
\(\Leftrightarrow\frac{5}{7}-y=\frac{3}{7}\)
\(\Rightarrow y=\frac{5}{7}-\frac{3}{7}=\frac{2}{7}\)
\(\frac{1}{2}:0,5-\frac{1}{4}:0,25+\frac{1}{8};0,125-\frac{1}{10}:0,1=\frac{1}{2}:\frac{1}{2}-\frac{1}{4}:\frac{1}{4}+\frac{1}{8}:\frac{1}{8}-\frac{1}{10}:\frac{1}{10}=1-1+1-1=0+0=0\)
em ơi cái này = 0 . Anh chắc chắn vs em 100000000000000000000000000000000000000000000000000000000000000000%
Anh lớp 7 mà
không nói linh tinh nha thánh troll trả lời thì trả lời đi bị trừ điểm đó
\(\frac{7}{10}-y=0,5+0,68\)
\(\frac{7}{10}-y=1,18\)
\(y=\frac{7}{10}-1,18\)
\(y=-0,48\)
bạn gì ơi số kia to thế sao trừ đc