[tex]\it Fie\ \ x\ -\ pre\c{\it t}ul\ ini\c{\it t}ial\\ \\ \\ a)\ x+\dfrac{20}{100}\cdot x=48|_{\cdot100} \Rightarrow 120x=4800|_{:120} \Rightarrow x=40\ \ell ei\\ \\ \\ b)\ x-\dfrac{5}{100}\cdot x=475|_{\cdot100} \Rightarrow 95x=47500|_{:95} \Rightarrow x=500\ \ell ei[/tex]
Răspuns:
x pretul initial ; 120 x/100=48 ; x=48*10/12=40 ; b) 100%-5%=95% ; 95 x /100=475 ; x =475*100/95 =500 ; c) 75 x /100*75/100=16 ; x =16*10000/5625=28,44
Explicație pas cu pas:
