Question

A si B SUNT DIRECT PROPORTIONATE CU 3 SI 4 , IAR 2a + 3B = 3240
Determinati A si B urgent va rog

Answer 1

a$\frac{A}{3} = \frac{B}{4}=k$=>A=3K; B=4K
Inlocuind in suma, obtinem: 2*3K+3*4K=3240=>6K+12K=3240=>18K=3240=>K=180
A=3*180=540
b=4*180=720

Answer 2

{A;B}={3;4}=>A/3=B/4=K=>A=3K   B=4K
2A+3B=3240
2*3K+3*4K=3240
18K=3240
K=3240/18
A=3240/18*3=540
B=3240/18*4=720