x/25=−3/15.7/6b)x/25=−3/15.7/6

=>x/25=−7/30=>x/25=−7/30

=>x=−7/30.25=>x=−7/30.25

=>x=−35/6

\(\dfrac{x}{25}=-\dfrac{3}{15}\times\dfrac{7}{6}\)

\(\dfrac{x}{25}=-\dfrac{1}{5}\times\dfrac{7}{6}\)

\(\dfrac{x}{25}=-\dfrac{7}{30}\)

\(x=-\dfrac{7}{30}\times25\)

\(x=-\dfrac{35}{6}\)

x=\(\dfrac{35}{6}\)

mn giúp mình nha

\(=12-32\cdot\left\{800:407\right\}=12-32\cdot\dfrac{800}{407}=\dfrac{-20716}{407}\)

\(=3\)

2,07+ 4,15 +17,93 +5,85= 30

2,07 + 4,15 + 17,93 + 5,85

= ( 2,07 + 17,93 ) +  ( 4,15 + 5,85 )

=20 + 10

=30