Question

Làm bài 2 thui ạ

Answer 1

a) x=\(\dfrac{3}{7}\)- \(\dfrac{1}{5}\)

x= \(\dfrac{15}{35}-\dfrac{7}{35}\)

x=\(\dfrac{8}{35}\)

b) x=\(\dfrac{2}{3}-\dfrac{4}{5}\)

x=\(\dfrac{10}{15}-\dfrac{12}{15}\)

x= \(\dfrac{-2}{15}\)

c) \(\dfrac{5}{6}x=\dfrac{4}{3}+\dfrac{1}{2}\)

\(\dfrac{5}{6}x=\dfrac{8}{6}+\dfrac{3}{6}\)

\(\dfrac{5}{6}x=\dfrac{11}{6}\)

x= \(\dfrac{11}{6}.\dfrac{6}{5}\)

x=\(\dfrac{11}{5}\)

d) \(\dfrac{1}{4}x=\dfrac{-1}{4}-\dfrac{3}{4}\)

\(\dfrac{1}{4}x=-1\)

x= -1 .4

x= -4

f) (x+1)\(^2\)= \(\left(\dfrac{3}{4}\right)^2\)

x+ 1= \(\dfrac{3}{4}\)

x= \(\dfrac{3}{4}-1\)

x= \(\dfrac{3}{4}-\dfrac{4}{4}\)

x=\(\dfrac{-1}{4}\)