TINH CAI NAY :\(\frac{15}{5}:\frac{15}{5}\)
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-5/9+8/15+-2/11+-4/9/7/17
(-5/9+-4/9)+(8/15+7/15+-2/11
-1+1+-2/11
-2/11
(17/5+11/4)-22/5
123/20-22/5
123/20-88/20
35/20
\(\frac{5x-1}{10}+\frac{2x+3}{6}=\frac{x-8}{15}-\frac{x}{30}\)
\(\Rightarrow\frac{3\left(5x-1\right)}{30}+\frac{5\left(2x+3\right)}{30}=\frac{2\left(x-8\right)}{30}-\frac{x}{30}\)
\(\Rightarrow15x-3+10x+15=2x-16-x\)
\(\Rightarrow24x=-28\)
\(\Rightarrow x=-\frac{7}{6}\)
Bài làm
\(-\frac{27}{16}.\frac{4}{9}.\frac{5}{-7}.\frac{14}{5}\)
\(=\left(-\frac{3}{4}.\frac{1}{1}\right).\left(\frac{1}{-1}.\frac{2}{1}\right)\)
\(=-\frac{3}{4}.\frac{2}{-1}\)
\(=\frac{3}{2}\)
# Học tốt #
( 5/17+-2/17)+(-9/15+-2/5)
=(5/17+-2/17)+(-9/15+-6/15)
=3/17+-15/15
=3/17+(-1)
=(-14)/17
k mình nha! căm ơn bạn!!!!
\(\frac{5-\frac{5}{3}+\frac{5}{9}-\frac{5}{27}}{8-\frac{8}{3}+\frac{8}{9}-\frac{8}{27}}:\frac{15-\frac{15}{11}+\frac{15}{121}}{16-\frac{16}{11}+\frac{16}{121}}\)
\(=\frac{5\left(1-\frac{1}{3}+\frac{1}{9}-\frac{1}{27}\right)}{8\left(1-\frac{1}{3}+\frac{1}{9}-\frac{1}{27}\right)}:\frac{15\left(1-\frac{1}{11}+\frac{1}{121}\right)}{16\left(1-\frac{1}{11}+\frac{1}{121}\right)}\)
\(=\frac{5}{8}:\frac{15}{16}\)
\(=\frac{2}{3}\)
=15/5 x 5/15 = 1
Đáp án là 1