Coucou,
Exercice 1:
a) 4y + 22 = 34
4y = 12
y = 12/4= 3
b) 23m + 14= 7m - 2
15m = -16
m= -16/15
c) 3(2t +5) = 4(5t+ 7)
6t + 15= 20t+ 28
15 = 14t + 28
-13= 14t
t= -13/14
d) 2(3y+4) +5(1-2y) = 7(2y-3)+12
6y+ 8 + 5-10y = 14y-21 + 12
-4y + 13 = 14y -9
13= 18y -9
22= 18y
y = 18/22
Exercice 2
(4a+3)(8-3a) = -2a( 6a -2)
32a - 12a^2 +24-9a=-12a^2 +4a
23a-12a^2 +24 = -12a^2 +4a
23a- 12a^2 +24 = -12a^2 +4a
23a +24 = 4a
—-> Oui
23a +24 = 4a
24= -19a
-24= 19a
a = -24/19
J’espère que tu as compris mes calculs et que je t’ai aidé.
