\(\Leftrightarrow x+61\cdot\left(\dfrac{1}{3}+\dfrac{17}{5}\right)=\dfrac{21}{8}:\dfrac{7}{5}=\dfrac{21}{8}\cdot\dfrac{5}{7}=\dfrac{105}{56}=\dfrac{15}{8}\)
\(\Leftrightarrow x+61\cdot\dfrac{5+51}{15}=\dfrac{15}{8}\)
\(\Leftrightarrow x=\dfrac{15}{8}-61\cdot\dfrac{56}{15}\simeq-225,86\)
`x+61×(1/3+2 7/5)=2 5/8:1 2/5`
`x+61×(1/3+17/5)=21/8:7/5`
`x+61xx(5/15+51/15)=21/8xx5/7`
`x+61xx56/15=105/56`
`x+61xx56/15=15/8`
`x+3416/15=15/8`
`x=15/8-3416/15`
`x= -27103/120`
`->` Xem lại đề nhé
`x+61xx(1/3+2 7/5)=2 5/8:1 2/5`
`x+61xx(1/3+17/5)=21/8:7/5`
`x+61xx56/15=15/8`
`x+3416/15=15/8`
`x=15/8-3416/15`
`x=-27103/120`
=> x + 61 . (1/3 + 17/5 ) = 21/8 : 7/5 = 21/8 . 5/7 = 105/56 = 15/8
=> x + 61 . ( 5 + 51) : 15 = 15/8
=> x = 15/8 - 61 . 56/15 ~ (- 115,86)
\(x+61\times\left(\dfrac{1}{3}+2\dfrac{7}{5}\right)=2\dfrac{5}{8}:1\dfrac{2}{5}\)
\(x+61\times\left(\dfrac{1}{3}+\dfrac{17}{5}\right)=\dfrac{21}{8}:\dfrac{7}{5}\)
\(x+61\times\dfrac{56}{15}=\dfrac{15}{8}\)
\(x+\dfrac{3416}{15}=\dfrac{15}{8}\)
\(x=\dfrac{15}{8}-\dfrac{3416}{15}\)
`x=-27103/120`
