Question

tìm x :

a)\(\left(4,5x-5\frac{1}{3}\right).\frac{1}{12}+50\%.x=\frac{3}{2}\)

b)60%x + 2/3 x=684

giải giùm mk nha các bn

Answer 1

a (\(\frac{9}{2}\)x -  \(\frac{16}{3}\)).\(\frac{1}{12}\) + \(\frac{1}{2}\)x=\(\frac{3}{2}\)

\(\frac{9}{2}\)x . \(\frac{1}{12}\) - \(\frac{16}{3}\) . \(\frac{1}{12}\) + \(\frac{1}{2}\)x=\(\frac{3}{2}\)

( \(\frac{9}{2}\)x . \(\frac{1}{12}\) + \(\frac{1}{2}\)x) - \(\frac{16}{3}\) . \(\frac{1}{12}\) = \(\frac{3}{2}\)

x. ( \(\frac{9}{2}\) . \(\frac{1}{12}\) +\(\frac{1}{2}\)) - \(\frac{4}{9}\) = \(\frac{3}{2}\)

x.\(\frac{7}{8}\) = \(\frac{3}{2}\) + \(\frac{4}{9}\) = \(\frac{35}{18}\)

x= \(\frac{35}{18}\) : \(\frac{7}{8}\) = \(\frac{20}{9}\) Vậy x=\(\frac{20}{9}\)

b 60%+2/3x=684

3/5x+2/3x=684

x(3/5+ 2/3) = 684

x. 19/15 = 684

x=540. Vậy x=540