Answer:

Step-by-step explanation:
Hi there!
Let
represent "the number".
The difference of a number and 1
⇒ 
I hope this helps!
Ok so ax + 3b = 2f
If you take '3b' away from both sides,
This means that ax = 2f -3b
And so once you divide both sides by a, you get:
x = (2f-3b)/a
Hope this helped
Answer: 247
Use long multiplication to evaluate.
After that divide your answer by either 13 or 19 and see if you get one of those answers.
247÷19=13
247÷13=19