Question

daca x supra y egal cu 5 supra 7 si x + y = 36 , cat este x ?? va rog urgent am teza

Answer 1

deci:5×3=15;7×3=21
atunci:15 supra 21=5 supra 7
x=15
totul se face prin simplificare

Answer 2

$\frac{x}{y} = \frac{5}{7} \\ \\ x+y=6 \\ \\ 7x=5y;x= \frac{5y}{7}$

in inlocuim pe x in ecuatia a doua
$\frac{5y}{7}+y=6 \\ \\ 5y+7y=42 \\ \\ 12y=42 \\ \\ y= \frac{7}{2} \\ \\ x= \frac{5y}{7}= \frac{5}{7}*y= \frac{5}{7}* \frac{7}{2} \\ \\ x= \frac{5}{2}$

$x= \frac{5}{2} ; y= \frac{7}{2}$

verificare
x+y=6
5/2+7/2=12/2=6