Question

Detrminati nr naturale a,b,c petru care $\frac{a}{2} = \frac{b}{3} = \frac{c}{5}$ si 2ab+3bc-ac=423

Answer 1

a=2b/3

c=5b/3

2ab+3bc-ac = (4b^2)/3 +5b^2 - (10b^2)/9=423

47b^2 = 3807

b=9

a=6

c=15

verificare ok