Answer:
15,22,29
Step-by-step explanation:
it takes a arithmetic progression
formula =a=15
n=3
common difference=3
a+n-1 d
15+3-1xd
15 +2d
45.00
4x+3x=7x
-3x-2x-3x-2x=-10x
2+2=4
-3x & 4