Question

Va rog repede!!(: Este urgent!!!!!

Answer 1

{a,b,c} d.p{ 0,(3); 1,5;1,25} => a/0,(3)=b/1,5 = c/ 1,25= k
a: 1/3 =k => a×3/1 = k=> 3a= k=> a= k/3
b: 3/2=k=> b× 2/3 =k=> 2b= 3k=> b= 3k/2
c: 5/4=k=> c×4/5 = k=> 4c= 5k => c= 5k/4

7×a-b+3×c=110
7/1 × k/3 - 3k/2+ 3/1×5k/4=110
7k/ 3 - 3k/2 + 15k/4=110
Aducem la acelasi numitor. numitorul comun este 12.
28k/12 - 18k/12 + 45k/12 =110
10k/12 + 45k/12 = 110
55k /12 =110
55k= 110×12
k= 110×12/55
se simplifica 110 cu 55 prin 55 si ramane
k= 2×12=> k= 24
a = 24/3 => a = 8
b = 3×24 /2 => b= 36
c= 5×24/4 => c= 30

Answer 2

Si Eu voi scrie pe foaie