Bonjour

A = 7 - x - 3 = - x + 4

B = 3 - z - 5 = - z - 2

C = 12 x - 2 - 7 x =  5 x - 2

D = 9 - 3 z + 1 = - 3 z + 10

Bonjour,

Simplifier:

A= 7-x-3= -x+4

B= 3-z-5= -z-2

C= 12x-2-7x= 5x-2

D= 9-3z+1= - 3z+10