Question

Daca:  x    = y = z = t si 4y +2t =132 ,afla numerele x,y,z,t
          2       3    4    5   

Ma scuzati ca nu am pus cum trebuie fractiile! : (x supra 2) = (y supra 3 ) = (z supra 4 )= (t supra 5)          Fast!! 20 puncte!

Answer 1

x/2= y/3= z/4= t/5= k

x=2k
y=3k
z=4k
t=5k

4y+2t=132
4*3k + 2* 5k= 132
12k+10k=132
22k=132
k=6

x=2*6=12
y=3*6=18
z=4*6=24
t=5*6=30

b) p% din 30=12

p/100*30=12

p/10* 3=12

p/10= 12/3

p/10=4

p=40%