Răspuns :
x + 48 = y
y : 2 = z
z - 17 = 15
z = 15+17
z = 32
y : 2 = 32
y = 32x2
y = 64
x + 48 = 64
x = 64-48
x = 16
y : 2 = z
z - 17 = 15
z = 15+17
z = 32
y : 2 = 32
y = 32x2
y = 64
x + 48 = 64
x = 64-48
x = 16