Question

19. If X=28 and Y=51. then (X+Y)+(X-Y)=?
(A) 53
(B) 56
(C) 59
printing press?
(D) 61​

Answer 1

Step-by-step explanation:

(x+y)+ (y-x)

(28+51) + (28-51)

79 + (-23)

49

Answer 2

(28+51)+(28-51)

(79)+(-23)

79-23

=56