Answer:
He would need to sell 33 copies to acquire a total pay of 3550.
If he sold 24 copies he would acquire a total pay of 3100.
Explanation:
#1 Steps
To find the amount copies needed to acquire a total pay of 3550 you must get that variable(c) by itself.
50c+1900=3550
Subtract 1900 from both sides
50c = 1650
Divide both sides by 50 to get find the amount of copies
c = 33
#2 Steps
C is the amount of copies so you would just substitute 24 in for and calculate to find the total pay amount.
We'll use y to represent the total pay amount
50(24)+1900=y
1200+1900=3100