tolong di jawab yaa jawab 1-3

1) (13a-8b)+ (12a-9b)
= 13a - 8b + 12a -9b
= 25a - 17b

2) (151+14b+13k) + (301-452+15k)
= 151 + 14b + 13k - 151 + 15k
= 14b + 28k

3) (3- 17x + 352) + (4x + 23x -9)
= -17x + 355 + 27x - 9
= 10x + 346