Question

hép tui với giải chi tiết nhaaaaa

Answer 1

a: \(\dfrac{x}{15}=\dfrac{2}{5}\)

=>\(x=15\times\dfrac{2}{5}=6\)

b:

ĐKXĐ: \(x\ne0\)

 \(\dfrac{27}{x}=\dfrac{3}{8}\)

=>\(\dfrac{27}{x}=\dfrac{27}{72}\)

=>x=72(nhận)

c:ĐKXĐ: \(x\ne7\)

\(\dfrac{3}{x-7}=\dfrac{27}{135}\)

=>\(\dfrac{3}{x-7}=\dfrac{3}{15}\)

=>x-7=15

=>x=15+7=22(nhận)

d: \(\dfrac{x-5}{3}=\dfrac{45}{27}\)

=>\(\dfrac{x-5}{3}=\dfrac{5}{3}\)

=>x-5=5

=>x=5+5=10