Răspuns :
x = Ana
y = Dragos
z = Alexandru
x + y + z = 427
y = 2x
z = 2y
z = 4x
x + 2x + 4x = 427
7x = 427 | : 7
x = 61 ( ilustratii are Ana )
y = 2x
y = 2 × 61
y = 112 ( ilustratii are Dragos )
z = 4x
z = 4 × 61 = 244 ( ilustratii are Alexandru )
y = Dragos
z = Alexandru
x + y + z = 427
y = 2x
z = 2y
z = 4x
x + 2x + 4x = 427
7x = 427 | : 7
x = 61 ( ilustratii are Ana )
y = 2x
y = 2 × 61
y = 112 ( ilustratii are Dragos )
z = 4x
z = 4 × 61 = 244 ( ilustratii are Alexandru )