Question

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Answer 1

32.
fie a,b,c si d numerele
a*0,5=b/3=c*0,4=d*0,2
a/2=b/3=2c/5=d/5=k
a=2k
b=3k
2c=5k
c=2,5k
d=5k
a+b+c+d=5
2k+3k+2,5k+5k=5
12,5k=5
k=0,4
a=0,8
b=1,2
c=1
d=2

33.
0,25=2,5/100=1/4
0,(3)=3/9=1/3
0,5=5/10=1/2

x=k/4
y=k/3
z=k/2
k/4*k/3+k/4*k/2+k/3*k/2=3*k/4*k/3*k/2k²/12+k²/8+k²/6=k³/8
2k²+3k²+4k²=3k³
9k²=3k³
3=k
x=3/4
y=3/3=1
z=3/2

34.
X*0,2=y*0,5=K
X/5=y/2=K
X/5=K x=5k
Y/2=K y=2k
2x+3y=48
2*5k+3*2k=48
10k+6k=48
16k=48k=3
X=15
Y=6
Sper ca te am ajutat!!Paaaaaa