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cine ma poate ajuta? dau steluta de aur

Cine Ma Poate Ajuta Dau Steluta De Aur class=

Răspuns :

Capsunica35
a+b+c=2530
a/7=b/11=c/5
a=7b/11
c=5b/11
7b/11+b+5b/11=2530
12b/11+11b/11=2530
23b/11=2530
b=2530*11/23=1210
b=1210
a=7*1210/11=770
a=770
c=5*1210/11=550
c=550
770+1210+550=2530 proba

Renatemambouko
1.
0,25a=0,2b    a/4=b/5       b=5a/4
3a+2b-6=60
3a+2×5a/4=60+6
3a+5a/2=66
6a+5a=132
11a=132
a=12
b=5×12/4=15

2.a/7=b/11=c/5       b=11a/7    c=5a/7
a+b+c=2530
a+11a/7+5a/7=2530
7a+11a+5a=2530
23a=17710
a=770 lei
b=770×11/7=1210 lei
c=770×5/7=550 lei


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