Question

3.a) Daca x supra 2=y supra3=z supra 4 si z=6 , aunci x+y =..................
b)Daca a ori 3=b ori 4 si a+b =14 , atunci a =.......................
c)Daca 40 la suta din x este egal cu 6 , atunci x este egal cu ...................

Answer 1

3.a)[tex] \frac{x}{2} = \frac{y}{3} = \frac{z}{4}stiind~ca~z=6,vine:\\\\\\ \frac{x}{2} = \frac{6}{4}=\ \textgreater \ x= \frac{6*2}{4} =\ \textgreater \ x=12:4=\ \textgreater \ x=3\\\\\\ \frac{y}{3} = \frac{3}{2} =\ \textgreater \ x= \frac{3*3}{2} =\ \textgreater \ x=9:2=\ \textgreater \ x=4,5[/tex].
c)[tex] \frac{40}{100} *x=6\\\\ \frac{2}{5} x=6\\ x= \frac{6}{ \frac{2}{5} } \\\\ x=6* \frac{5}{2}\\\\ x=15 [/tex]