Question

Các bn ghi rõ cách làm nha bn nào nhanh mk tích cho cảm ơn và mk đang cần gấp 

Bài 1: Tìm x, biết\(\frac{x+1}{3}=\frac{9}{2}\)

 

Answer 1

\(\frac{x+1}{3}=\frac{9}{2}\)

\(\left(x+1\right).2=9.3\)

\(\left(x+1\right).2=27\)

\(x+1=27:2\)

\(x+1=13,5\)

\(x=13,5-1=12,5\)

vậy x = 12.5

Answer 2

\(\frac{x+1}{3}=\frac{9}{2}\)

\(\Leftrightarrow2\left(x+1\right)=3\times9\)

\(\Leftrightarrow2\left(x+1\right)=27\)

\(\Leftrightarrow x+1=\frac{27}{2}\)

\(\Leftrightarrow x=\frac{25}{2}\)

Answer 3

\(\frac{x+1}{3}\)= \(\frac{9}{2}\)

:> 2( x +1) = 9 . 3

:> 2x + 2 = 27

:>       2x = 27 - 2

:>       2x = 25

:>        x = \(\frac{25}{2}\)

Answer 4

\(\frac{x+1}{3}=\frac{9}{2}\)

\(\Rightarrow2\left(x+1\right)=9.3\)

\(\Rightarrow2x+2=27\)

\(\Rightarrow2x=27-2\)

\(\Rightarrow2x=25\)

\(\Rightarrow x=25:2\)

\(\Rightarrow x=\frac{25}{2}\)

Vậy  \(x=\frac{25}{2}\)

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