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mình biết câu trả lời rùi

=73,8x11-73,8x1

=73,8x(11-1)

=73,8x10=738

\(=73,8\times11-73,8\times1\)

\(=73,8\times\left(11-1\right)\)

\(=73,8\times10\)

\(=738\)

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Lời giải:
$11\times (x-5)=5\times x+11$

$11\times x-11\times 5=5\times x+11$

$11\times x-5\times x=11\times 5+11$

$x\times (11-5)=11\times (5+1)$

$x\times 6=11\times 6$

$x=11$

(4/11+7/11)*5/6

=1*5/6=5/6

5/6.(4/11+7/11)

=5/6.1

=5/6

\(=\dfrac{11}{12}\left(\dfrac{2}{7}+\dfrac{4}{7}+\dfrac{1}{7}\right)=\dfrac{11}{12}\cdot1=\dfrac{11}{12}\)

=11/12

=32,65x110-11x32,65-33,65x1
=32,65x(110-11-1)
=32,65x98
=3199,7

Ta có: \(\frac94\times\frac{15}{11}+\frac34:\frac{11}{7}-\frac34\times\frac{8}{11}\)

\(=\frac34\times\frac{45}{11}+\frac34\times\frac{7}{11}-\frac34\times\frac{8}{11}\)

\(=\frac34\times\left(\frac{45}{11}+\frac{7}{11}-\frac{8}{11}\right)=\frac34\times\frac{44}{11}=3\)

\(\dfrac{9}{4}\times\dfrac{15}{11}+\dfrac{3}{4}:\dfrac{11}{7}-\dfrac{3}{4}\times\dfrac{8}{11}\)
\(=\dfrac{3}{4}\times3\times\dfrac{15}{11}+\dfrac{3}{4}\times\dfrac{7}{11}-\dfrac{3}{4}\times\dfrac{8}{11}\)
\(=\dfrac{3}{4}\times\dfrac{45}{11}+\dfrac{3}{4}\times\dfrac{7}{11}-\dfrac{3}{4}\times\dfrac{8}{11}\)
\(=\dfrac{3}{4}\times\left(\dfrac{45}{11}+\dfrac{7}{11}-\dfrac{8}{11}\right)\)
\(=\dfrac{3}{4}\times4\)
\(=3\)

`9/4xx15/11+3/4:11/7-3/4xx8/11`

`=3/4xx15/11xx3+3/4xx7/11-3/4xx8/11`

`=3/4xx45/11+3/4xx7/11-3/4xx8/11`

`=3/4xx(45/11+7/11-8/11)`

`=3/4xx4`

`=3`