Question

a:b=3 si b+c=137, sa se calculeze a+3*c

Answer 1

a÷b=3=>b=a/3; b+c=137 <=> a/3+c=137(aducem la acelasi numitor in partea stanga)(a+3c)/3=137 <=> a+3c=137×3<=>a×3c=211.

Answer 2

a:b=3
b+c=137
a+3*c=?
  Presupunem ca b=2
2+c=137
c=137-2
c=135

Stim ca a=6
6+3*135=
6+405=
 411