Question

1: tìm x biết:

a:    x-3/4= -5/7

Answer 1

\(\frac{x-3}{4}=-\frac{5}{7}\)

\(\Leftrightarrow7\left(x-3\right)=-5\cdot4\)

\(\Leftrightarrow7x-21=-20\)

\(\Leftrightarrow7x=1\)

\(\Leftrightarrow x=\frac{1}{7}\)

Answer 2

\(x-\frac{3}{4}=-\frac{5}{7}\)

\(=>x=-\frac{5}{7}+\frac{3}{4}\)

\(=>x=\frac{1}{28}\)

Answer 3

\(x-\frac{3}{4}=-\frac{5}{7}\)

\(\Rightarrow x=-\frac{5}{7}+\frac{3}{4}\)

\(\Rightarrow x=\frac{1}{28}\)

Answer 4

\(x-\frac{3}{4}=\frac{5}{7}\)

\(\Rightarrow x=\frac{5}{7}+\frac{3}{4}\)

\(\Rightarrow x=\frac{41}{28}\)

Answer 5

\(x-\frac{3}{4}=\frac{-5}{7}\)

\(x=\frac{-5}{7}+\frac{3}{4}\)

\(x=\frac{1}{28}\)

chúc bạn học tốt(nhớ like cho mink)

Answer 6

bn ghi đề bài kiểu này dễ bị nhầm lẫn lắm