5 (x-3y)

-12 (a+b)

-a (-7+3b)

b (5-2a)

(6x-3) - (5x-2)

- (7a-4) + (9a-8)

28+36

-28+36

28-36-

-28-36-

-28 + (-36)

28 + (-36)

5 (x-3y) = 5x-15y

-12 (a+b) = - 12a-12b

-a (-7+3b) = 7a-3ab

b (5-2a) = 5b-2ab

(6x-3) - (5x-2) = 6x-3-5x+2=x-1

- (7a-4) + (9a-8) = - 7a+4+9a-8=2a-4

28+36=64

-28+36=8

28-36=-8

-28-36=-64

-28 + (-36) = - 64

28 + (-36) = - 8

5 х-15 у

-12 а-12b

7 а-3 аb

5b-2ab

6x-3-5x+2=x-1

-7a+4+9a-8=2a-4

64

8

-8

-64

-64

-8