Question

-Find the sum or difference

1. (5b-9) + (b+8)
2.(3m+5) - (6-5m)
3.(1-9z) + 3(z-2)
4.(7g-6) - (-3n-4)

Answer 1

1. 6b-1
2.8m-1
3.-5-6z
4.7g-2+3n