Répondre :
bonsoir
1 . aire parterre = 5 ( 2 x + 1 ) = 10 x + 5
2. aire pelouse = 8² - ( 10 x + 5 ) = 64 - 10 x - 5 = - 10 x + 59
10 x + 5 = - 10 x + 59
10 + 10 x = 59 - 5
20 x = 54
x = 2.7
bonsoir
1 . aire parterre = 5 ( 2 x + 1 ) = 10 x + 5
2. aire pelouse = 8² - ( 10 x + 5 ) = 64 - 10 x - 5 = - 10 x + 59
10 x + 5 = - 10 x + 59
10 + 10 x = 59 - 5
20 x = 54
x = 2.7