Question

( 2,8x  -32 ) :  \(\frac{2}{3}\) =  -90                                           (  4,5 - 2x )  .  1\(\frac{4}{7}\) =   \(\frac{11}{14}\)

Answer 1

\(\left(2,8x-32\right):\frac{2}{3}=-90\)

\(2,8x-32=-60\)

\(2,8x=-28\)

\(x=-10\)

Vậy x = -10

Answer 2

\(\left(4,5-2x\right).1\frac{4}{7}=\frac{11}{14}\)

\(\left(4,5-2x\right).\frac{11}{7}=\frac{11}{14}\)

\(4,5-2x=\frac{1}{2}\)

\(2x=4\)

\(x=2\)

Vây x = 2