Question

[nguyễn Trần Thục Quyên]

Tính theo cách thuận tiện:

21/11 x 22/17 x 68/63

Tìm x, biết:

18- x : 2=16

Answer 1

[🎉 Party Popper]

\(\frac{21}{11}\)x \(\frac{22}{17}\)x\(\frac{68}{63}\)

= \(\frac{42}{17}\)x\(\frac{68}{63}\)

= \(\frac{8}{3}\)

18 - x : 2 = 16

x : 2        = 18 - 16

x             = 2 x 2

x             = 4

Answer 2

[nguyen thi bao tien]

\(\frac{21}{11}\times\frac{22}{17}\times\frac{68}{63}\)

\(=\frac{21}{11}\times\frac{22\times68}{17\times63}\)

\(=\frac{21}{11}\times\frac{22\times4}{1\times63}\)

\(=\frac{21}{11}\times\frac{88}{63}\)

\(=\frac{21\times88}{11\times63}\)

\(=\frac{1\times8}{1\times3}\)

\(=\frac{8}{3}\)

\(18-x:2=16\)

\(x:2=18-16\)

\(x:2=2\)

\(x=2\times2\)

\(x=4\)