Question

Tìm X : a) 2 /3 = 12/ X

           b) 14/ 56 = 1/ X

           c) X /125 = 2/5

                                       Ai giải đầu tiên mình sẽ cho 1 tick đúng !!!!!

Answer 1

a) 2/3 = 12/18 => x = 18

b) 14/56 = 1/4 => x = 4

c) 2/5 = 50/125 => x = 50

Answer 2

a)\(\frac{2}{3}=\frac{12}{x}\)

\(\frac{2\cdot6}{3\cdot6}=\frac{12}{x}\)

\(\frac{12}{18}=\frac{12}{x}\)

x=12

b)\(\frac{14}{56}=\frac{1}{x}\)

\(\frac{14\div14}{56\div14}=\frac{1}{x}\)

\(\frac{1}{4}=\frac{1}{x}\)

x = 4

c)\(\frac{x}{125}=\frac{2}{5}\)=

\(\frac{x}{125}=\frac{2\cdot25}{5\cdot25}\)

\(\frac{x}{125}=\frac{50}{125}\)

x = 50