résoudre les équations 1. -4x+8=5x-10 2. 3(2x-1)-3(x+2)=0 3.-2(3x+1)=-x-3
Bonsoir
1)
-4x+8 = 5x-10
8+10 = 5x+4x
9x =18
x = 18/9 = 2
2)
3(2x-1)-3(x+2) = 0
3 [ ( 2x-1) -(x+2)] =0
3( x-3) =0 alors
x-3 = 0
x = 3
3)
-2(3x+1) =-x-3
-6x - 2 +x +3 = 0
-5x = -1
x =1/5
