a) \(52.\left(y:78\right)=3380\)
\(y:78=3380:52\)
\(y:78=65\)
\(y=65.78\)
\(y=5070\)
a)52x(y:78)=3380
y:78=3380:52
y:78=65
y=65x78
y=5070
Vậy y=5070
b)\(\frac{15}{9}x\frac{3}{8}< y< \frac{67}{15}+\frac{66}{15}\)
\(\frac{5}{8}< y< \frac{133}{15}\)
\(\frac{75}{120}< y< \frac{1064}{120}\)
\(\Rightarrow y\in\left[\frac{76}{120};\frac{77}{120};...;\frac{1063}{120}\right]\)
y= (3380/52)*78 ======== máy tính
b)=bí , giải ra mắc công bị chửi ngu
a, \(52\left(y:78\right)=3380\)
\(y:78=3380:52\)
\(y:78=65\)
\(y=65.78=5070\)
b, \(\frac{15}{19}.\frac{3}{8}< y< \frac{67}{15}+\frac{66}{15}\)
\(\Rightarrow\frac{45}{152}< y< \frac{133}{15}\)
\(\Rightarrow\frac{45}{152}< y< 8\frac{13}{15}\)
Vì y là số tự nhiên \(\Rightarrow\frac{45}{152}< 0\le y< 8\frac{13}{15}\)
\(\Rightarrow y\in\left\{0;1;2;3;4;5;6;7\right\}\)
\(\)
a, 52.(y:78)=3380
=> y:78=3380:52
=> y:78=65
=> y=65.78
=> y=5070
b, 15/19 . 3/8 < y < 67/15 + 66/15
<=> 45/152 < y < 133/15
<=> 0,3 < y < 8,9
Vì y là số tự nhiên nên y ϵ { 1; 2; 3; 4; 5; 6; 7 }
