Réponse :
Explications étape par étape
Bonjour
Rond : R
Triangle : T
Carré : C
C = R - 3
T = C x 5
R = T + 22
R = 5C + 22
R = 5(R - 3) + 22
R = 5R - 15 + 22
R - 5R = 7
-4R = 7
R = -7/4
C = R - 3
C = -7/4 - 3
C = -7/4 - 12/4
C = -19/4
T = C x 5
T = -19/4 x 5
T = -95/4
Et on vérifie le dernier :
R = T + 22
R = -95/4 + 22
R = -95/4 + 88/4
R = -7/4 ok
