Question

a+b+c=2520 unde se stie ca a=b+b+b si c=b+b
Ajutati-ma va rog care stie cum

Answer 1

$a+b+c=2520 \\ \\ a=b+b+b\\ \\ c=b+b \\ \\----------------- \\ \\ b+b+b+b+b+b=2520 \\ \\ 6b=2520 \\ \\ b=2520:6 \\ \\ b=420 \\ \\ a=b+b+b=3b \\ \\ a=3*420 \\ \\ a=1260 \\ \\ c=b+b=2b \\ \\ c=2*420 \\ \\ c=840 \\ \\ Verificare:1260+840+420=2520$

Answer 2

$a + b + c = 2520$

$a = b + b + b$

$c = b + b$

_______________________

$a , b , c = ?$

Inlocuim pe a si pe c in prima ecuatie ca sa il aflam pe b ...

$b + b + b + b + b + b = 2520$

$6b = 2520$

$b = \frac{2520}{6}$

b = 420

$a = 420 + 420 + 420$

a = 1260

$c = 420 + 420$

c = 840

$verificare : 420 + 1260 + 840 = 2520$ ✔

$Raspuns : \left[\begin{array}{ccc}a = 1260&b = 420&c = 840\\\\\end{array}\right]$