Ex 67 svp ! :( aidez moi ! :(

a)
-2+(-5) = -7
-2x-5 = 10

b)
5 + (-2) = 5-2 = 3
5x-2 = -10

c)
7+4 = 11
7x4 = 28

d)
-8+5 = -3
-8x5 = -40