Bonjour, Je n'arrive pas à faire mon exercice pouvez vous m'aider svp et bien dévélopper Résoudre chaque équation. a) 2(x + 1) = 3(x - 1) b) 3(2 - 3y ) = - (y - 2 ) c) -2(a - 1 ) = 4(2a + 1 )
a) 2(x+1) = 3(x-1)
2x+2 = 3x-3
2x-3x = -3-2
-x = -5
x = 5
b) 3(2-3y) = -(y-2)
6-9y = -y+2
-9y+y = 2-6
-8y = -4
y = 4/8 = 1/2
C) -2(a-1) = 4(2a+1)
-2a+2 = 8a+4
-2a-8a = 4-2
-10a = 2
a = 2/-10 = -1/5
2(x+1) = 3(x-1)
2x+2 = 3x-3
2x-3x = -3-2
-x = -5
3(2-3y) = - (y-2)
6 -9y = -y+2
-9y +y = 2-6
-8y = -4
y = 4/8 = 1/2
-2(a-1) = 4 (2a+1)
= -2a+2 =8a+4
= -2a-8a = 4-2
-10a = 2
a = -2/10 = -1/5
