Question

2. Det. nr x si y stiind ca sunt i.p. cu 0,5 si 0,(3) si suma lor este 360 3) Stiind ca a/1,5=2/b , calculati 2a-3

Answer 1

2.
0,5=5/10=1/2
0,(3)=3/9=1/3
x/2 = y/3 = k
x=2k
y=3k
2k+3k=360
5k=360 =>k=72
=>x=144
=>y=216

3.
$\frac{a}{1,5} = \frac{a}{ \frac{15}{10} } = \frac{a}{ \frac{3}{2} } = \frac{2a}{3}$
$\frac{2a}{3} = \frac{2}{b} =\ \textgreater \ 2ab=6 =\ \textgreater \ 2ab-3=3$