Question

tim x biet 50%.x+2/3.x=x+4

Answer 1

\(50\%x+\frac{2}{3}x=x+4\)

\(\Rightarrow x\left\{\frac{1}{2}+\frac{2}{3}=x=4\right\}\)

\(\Rightarrow\frac{7}{6}x=x+4\) 

\(\Rightarrow7x=\left\{x+4\right\}6\)

\(\Rightarrow7x=6x+24\)

\(\Rightarrow7x-6x=24\)

\(\Rightarrow x=24\)

Answer 2

\(50\%\cdot x+\frac{2}{3}\cdot x=x+4\)

\(\frac{1}{2}x+\frac{2}{3}x=x+4\)

\(\left(\frac{1}{2}+\frac{2}{3}\right)x=x+4\)

\(\frac{7}{6}x=x+4\)

\(\left(\frac{7}{6}-1\right)x=4\)

\(\frac{1}{6}x=4\)

\(\Rightarrow x=24\)

Answer 3

\(50\%x+\frac{2}{3}x=x+4\)

\(\Rightarrow x\left(\frac{1}{2}+\frac{2}{3}\right)=x+4\)

\(\Rightarrow\frac{7}{6}x=x+4\)

\(\Rightarrow7x=\left(x+4\right)6\)

\(\Rightarrow7x=6x+24\)

\(\Rightarrow7x-6x=24\)

\(\Rightarrow x=24.\)

Answer 4

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