Question

DAU VOROANA ❗ TOATA FIȘA VAROG❗ VA DAU O MIE DE MULTUMIRI MAINE VOI DA TEST SI NE DA RASPUNSURILE ASTEA VVVVVVVVAAAAAAAARRRRRRRREEOOOOOOOOOOOGGGGGGGGG FFFFFFFRRRREEEUUUUUUMMMMMOOOOSSSSSSSSS!!!!!!!!!!!!!! vvvvvaaarrrrooogggggg foarte frumos!!!! ajutor mult ajutor VA roggggg❗

Answer 1

1
daca 5kg....20 lei
  1 kg........ x lei⇒x=20:5= 4 lei
daca 1 kg= 4 lei, atunci 3kg =4×3=12 lei

2)
2F+3T=90⇒ 3T=90-2F
4F+3T=120⇒ 4F+90 -2F=120⇒2F=120-90⇒2F=30⇒F=15
3T=90-2F=90-30⇒3T=60⇒T=60:3=20
deci bilet film = 15 lei iar cel de teatru T=20 lei

3) T=3C
T+C=48  dar T=3C⇒ 3C+C=48⇒C=12   dat T=3C=3×12=36 ani are tatal si 12 ani copilul

5)
g+p=6⇒g=6-p
2g+4p=16  deci 2(6-p)+4p=16
12-2p+4p=16
2p=4
p=2
g=6-p=6-2=4
deci porci p=2  si gaini g=4


6)
2x+4y=28 se imparte cu 2⇒x+2y=14⇒x=14-2y
5x+3y=35⇒5(14-2y)+3y=35⇒y=5  si x+2y=14⇒x=14-2×5=4
deci x=4  si y=5

7)
A+M=1000 lei
(A+40)=(M-20)⇒M-A=40+20⇒M-A=60
dar
M+A=1000
M-A=60⇒M-60=A
se aduna cele 2 ecuatii
2M=1060⇒M=1060:2=530
deci M=530 lei
530-60=A⇒A=470 lei