Question

daca a supra b =3 supra 8 atunci valoarea raportului 4a+b supra 3a-b etse egala cu

Answer 1

a/b = 3/8 => b = 8a/3
(4a+b) / (3a-b) = (4a+8a/3) / (3a- 8a/3) =
= (3×4a + 8a)/3 /(3×3a-8a)/3 /3 =
= (12a+8a)/3 / (9a-8a)/3 =
= 20a/3 / a/3 = 20a/3 × 3/a = 20a/a = 20