Question

Tìm x , biết

a ,\(\frac{-2}{3}\)- 3x = 0,75 + 5x

b, \(\frac{11}{12}\)- ( \(\frac{2}{5}\)+ x ) = \(\frac{2}{3}\)

Mọi người giải hộ mình nha mình đang cần gấp

Answer 1

a) \(\frac{-2}{3}\)- 3x = 0,75 + 5x

3x + 5x = \(\frac{-2}{3}\)- 0,75

8x = \(\frac{-17}{12}\)

x = \(\frac{-17}{12}\): 8

x =\(\frac{-17}{96}\)

Vậy x = \(\frac{-17}{96}\) 

b) \(\frac{11}{12}\)- (\(\frac{2}{5}\)+ x ) = \(\frac{2}{3}\)

\(\frac{2}{5}\)+ x = \(\frac{11}{12}\)-\(\frac{2}{3}\)

\(\frac{2}{5}\)+ x = \(\frac{1}{4}\)

x = \(\frac{1}{4}\)- \(\frac{2}{5}\)

x = \(\frac{-3}{20}\)

Vậy x = \(\frac{-3}{20}\)