Question

Daca a/3=b/4=c/7 sia+b+c=70 afla nr a,b,c
va rogggggggggggg

Answer 1

a=3*5=15
b=4*5=20
c=4*7=35

le-am aflat cu K

Answer 2

a+b+c=70
a/3=b/4=c/7
a/3=b/4⇔ 4a=3b⇔ a=3b/4

b/4=c/7 ⇔7b=4c⇔ c= 7b/4

3b/4+b+7b/4=70
3b+4b+7b=70*4
14b=280
b=20


a/3=20/4⇔ a/3= 5⇔ a=15

20/4=c/7 ⇔ c/7=5⇔ c=35

a=15
b=20
c=35
a+b+c= 15+20+35= 70