Verified answer

Explications étape par étape:

(x+3 +y)×2 = 2x + 6 + 2y = 28

2x + 2y = 28- 6 = 22

2(x+y) = 22 x+y = 28/2 = 11. x = 11-y

(x × 3y)2 = 2x + 3y = 32

2(11-y) + 3y = 22- 2y +3y = 22+y = 32

y = 32 - 22 = 10

2x + 6 + 2y = 2x + 6 + 20 = 2x + 26 = 28

x = (28-6)/2 =1

(1+3+10) ×2 =28

[1+ (3×10) ] ×2 = 32

les mesures sont 10cm et 1cm