Answer:
3p + 26
Step-by-step explanation:
Let S = Sue's newspapers sold
B = Bill's newspapers sold
H = Harry's newspapers sold.
We have three conditions:
(1) S = B + 26
(2) B = 3H
(3) H = p Substitute (3) into (2)
(4) B = 3p Substitute (4) into (1)
S = 3p + 26
Sue sold 3p + 26 newspapers.