5/17+6/34
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\(-\dfrac{17}{14}:\left(-\dfrac{34}{7}\right)+\dfrac{10}{3}\left(\dfrac{1}{5}-\dfrac{3}{4}\right)-\dfrac{6}{5}\left(\dfrac{1}{3}-\dfrac{5}{6}\right)\)
\(=\dfrac{17}{14}.\dfrac{7}{34}+\dfrac{10}{3}.\left(-\dfrac{11}{20}\right)-\dfrac{6}{5}.\left(-\dfrac{9}{18}\right)\)
\(=\dfrac{1}{4}-\dfrac{11}{6}+\dfrac{9}{15}\)
\(=\dfrac{15-110+36}{60}\)
\(=-\dfrac{59}{60}\)
a: \(=2.125+5.375+7.15+6.85+7.5\)
=7,5+14+7,5
=15+14=29
b: \(\Leftrightarrow\left(\dfrac{4}{5}\cdot\dfrac{5}{6}+\dfrac{1}{5}\cdot x\right)\cdot30=60\)
=>(2/3+1/5x)=2
=>1/5x=2-2/3=4/3
=>x=4/3*5=20/3
(-13/31 + -18/31) : 5/17 . 25/34 = -1 . 17/5 . 25/34
= -17/5 . 25/34
= -425/170
= -5/2
\(\dfrac{5}{17}\) + \(\dfrac{6}{34}\)
= \(\dfrac{5}{17}\) + \(\dfrac{3}{17}\)
= \(\dfrac{8}{17}\)
8/17