a) 153+1980:36-18x11

=153+55-198

=10

b) 174x (23+7896:168)

=174x (23+47)

=174x 70

=12180

a)=10

b)=12180

 \(a,\)\(153+1980:36-18\times11\)

\(=153+55-198\)

\(=10\)

\(b,\)\(174\times\left(23+7896:168\right)\)

\(=174\times\left(23+47\right)\)

\(=174\times70\)

\(=12180\)

Ddaeng

\(18+\dfrac{1}{11}\times\left(x-18\right)=36+\dfrac{1}{11}\times\left[\dfrac{10}{11}\times\left(x-18\right)-36\right]\)

\(\Leftrightarrow\dfrac{198}{11}+\dfrac{1}{11}\times\left(x-18\right)=36+\dfrac{1}{11}\times\left[\dfrac{10}{11}\times\left(x-18\right)-\dfrac{396}{11}\right]\)

\(\Leftrightarrow\dfrac{198+x-18}{11}=36+\dfrac{1}{11}\times\dfrac{10x-180-396}{11}\)

\(\Leftrightarrow\dfrac{180+x}{11}=36+\dfrac{10x-576}{121}\)

\(\Leftrightarrow\dfrac{1980+11x}{121}=\dfrac{4356}{121}+\dfrac{10x-576}{121}\)

\(\Leftrightarrow1980+11x=4356+10x-576\)

\(\Leftrightarrow11x-10x=4356-1980-576\)

\(\Leftrightarrow x=1800\)

=9/4x2/3+16/9x4/3

=18/12+64/36

=54/36+64/36=118/36=59/18

 36/16 x 12/18 + 32/18 x 24/18 

\(=\dfrac{9}{4}\times\dfrac{2}{3}+\dfrac{16}{9}\times\dfrac{4}{3}\)

\(=\dfrac{3}{2}+\dfrac{64}{27}\)

\(=\dfrac{209}{54}\)

\(\frac{9\times11\times36}{33\times27\times18}=\frac{1\times1\times2}{3\times3\times1}=\frac{2}{9}\)

\(\frac{9\cdot11\cdot36}{33\cdot27\cdot18}=\frac{9\cdot11\cdot2\cdot18}{3\cdot11\cdot3\cdot9\cdot18}=\frac{2}{9}\)

Chu'c hok to^'t nha!

Trả lời :

9 × 11 × 18 × 2 / 11 × 3 × 9 × 3 × 18

= 2/9 

# chúc bạn học tốt ạ #

13/36-5/18-x=-11/9

5/18-x=13/36-(-11/9)

5/18-x=19/12

x=5/18-19/12

x= -47/36

vậy x = -47/36

\(\frac{13}{36}-\frac{5}{18}-x=\frac{-11}{9}\)

\(\Leftrightarrow\)\(\frac{13}{36}-\frac{10}{36}-x=\frac{-44}{36}\)

\(\Leftrightarrow\frac{3}{36}-x=\frac{-44}{36}\)

\(\Leftrightarrow x=\frac{3}{36}-\frac{-44}{36}\)

\(\Leftrightarrow x=\frac{47}{36}\)

chắc là vậy

\(\frac{13}{36}\)- \(\frac{5}{18}\)- x = \(\frac{-11}{9}\) 

\(\Leftrightarrow\)13 - 5.2-x=-11 . 4

 \(\Leftrightarrow\)x= -44 -13 +10 

\(\Leftrightarrow\)x= -47