Question

Daca a-b=15,a:b=4,Dublul sumei celor 2 va fi egal cu:
Va rog enorm de mult sa o rezolvati!

Answer 1

a-b=15...4b-b=15...3b=15...b=15:3...b=5

a:b=4
a=4b


a=4b....a=4×5....a=20

(a+b)×2=(20+5)×2=25×2=50 (dublul sumei celor 2 numere)

Answer 2

a-b = 15
a:b = 4 => a = 4×b
a |___|___|___|___|
b |___|
4 segmente egale - 1 segment egal = 3 segmente egale = 15
15 : 3 = 5 (un segment egal)
a = 4×5 = 20
b = 5

2 × (20+5) = 2 × 25 = 50 (dublul sumei )

Verificare:
20-5 = 15
20 : 5 = 4

a = 20
b = 5