résoudre les équation a)x+2=5; b)-3+x=4; c)6-x=2; d)-x-5=-2.

a) x + 2 = 5 --> x = 5 - 2 --> x = 3
b) -3 + x = 4 -> x = 4 + 3 --> x = 7
c) 6 - x = 2 --> -x = 2 - 6 --> -x = -4 --> x = 4
d) -x -5 = -2 --> -x = -2 + 5 --> -x = 3 --> x=-3

a) x=3
b) x=7
c) x=4
d) x=-3