Réponses

2014-03-18T16:31:51+01:00
A) Aire du carré : x²
Aire du rectangle
(x+5)(x+8) = x²+183
x²+8x+5x+40 = x²+183
13x = 183-40
13x = 143
x = 143/13
x = 11

b) 7x+24 = 9x-32
9x-32 = 7x+24
9x-7x-32 = 24
2x = 24+32
2x = 56
x = 56/2
x = 28