\(\frac{X+1}{3}=\frac{y+2}{4}=\frac{Z+3}{5}\)=\(\frac{\left(x+1\right)+\left(y+2\right)+\left(z+3\right)}{3+4+7}\)=\(\frac{18+1+2+3}{3+4+5}\)=\(\frac{24}{12}\)=2
\(\frac{x+1}{3}=2\)nên x=(2.3)-1=5
\(\frac{y+2}{4}=2\)nên y=(2.4)-2=6
\(\frac{z+3}{5}=2\)nên z=(2.5)-3=7
Học tốt bạn nhé!