Factorise Fully

Question 1:

9j+63
9 j+7

Question 2:

21n+30
3 7n+10

Question 3:

80w+24
8 10w+3

Question 4:

4r27r
r 4r7

Question 5:

9gr5g
g 9r5

Question 6:

42t2+49nt
7t 6t+7n