Question

Tìm x

X-2=3

(6 và 3/7-0,75x-2/0,35)×2,8=10

Answer 1

 x - 2 =3

      x =3+2

      x =5

\(6\frac{3}{7}-0,75x-\frac{2}{0,35}\times2,8=10\)

\(\frac{45}{7}-\frac{3}{4}x-\frac{40}{7}\times\frac{28}{10}=10\)

\(\frac{45}{7}-\frac{3}{4}x=10+4\)

\(\frac{3}{4}x=\frac{45}{7}-14\)

\(\frac{3}{4}x=-\frac{53}{7}\)

\(x=-\frac{53}{7}:\frac{3}{4}\)

\(x=\frac{-212}{21}\)