Question

a:b=7. c:a=5. a-b=60,determinați numărul natural c.

Answer 1

a : b = 7 <=> a = 7b
a - b = 60 <=> 7b - b = 60 <=> 6b = 60 <=> b = 60/6 <=> b = 10
a - b = 60 <=> a = 60 - b = 60 - 10 = 50
c : a = 5 <=> c = 5a <=> c = 5*50 <=> c = 250

Answer 2

a:b=7
c:a=5
a-b=60
7×b=a
7b-b=60
6b=60
b =60:6
b=10
a:10 =7
a=7×10
a=70
c=70×5
c=350
Sper ca te am ajutat