Răspuns :
fie x şi y necunoscutele noastre .
x : y = 1, 25
x = 2 ( y - 6)
⇒ 2 (y-6) : y = 1,25
2y-12=1,25y
2y-1,25y = 12
0,75 y = 12
y = 12 : 0,75
y = 1200:75
y = 16 .
x = 2(16-6)
x = 2 · 10
x = 20 .
x : y = 1, 25
x = 2 ( y - 6)
⇒ 2 (y-6) : y = 1,25
2y-12=1,25y
2y-1,25y = 12
0,75 y = 12
y = 12 : 0,75
y = 1200:75
y = 16 .
x = 2(16-6)
x = 2 · 10
x = 20 .
1,25=1 intreg 25/100= 1 intreg 1/4= 5/4
2(a-6)=b
a/b=5/4
a/5=b/4=k
a=5k
b=4k
2(5k-6)=4k
10k -12=4k
10k-4k=12
6k=12
k=2
a=5*2=10
b=4*2=8
2(a-6)=b
a/b=5/4
a/5=b/4=k
a=5k
b=4k
2(5k-6)=4k
10k -12=4k
10k-4k=12
6k=12
k=2
a=5*2=10
b=4*2=8