Răspuns :
a + b + c = 43
x = 2y z = x -7
x + x/2 + x-7 = 43
x + x/2 + x = 50
5 x = 100
x = 20
y = 10
z = 20=7 = 13
x = 2y z = x -7
x + x/2 + x-7 = 43
x + x/2 + x = 50
5 x = 100
x = 20
y = 10
z = 20=7 = 13
/---/---/
/---/
/---/---/-7
43+7=50
50:5=10 vas dunu
10×2=20 vas doi
10×2-7=13 vas trei
/---/
/---/---/-7
43+7=50
50:5=10 vas dunu
10×2=20 vas doi
10×2-7=13 vas trei