Answer: for 2 hours of web designing , they charge same amount.
Explanation:
Let x = Number of hours.
Total charge = Initial fee + (Charge per hour x Number of hours )
For Designer A,
Total charge = 550 + 120x
For Designer B,
Total Charge = 660+65 x
When the two designers charge the same amount of money, then
550 + 120x = 660+65 x
⇒ 120x-65x= 660-550
⇒ 55x= 110
⇒ x = 2 [Divide both sides by 2]
So, for 2 hours of web designing , they charge same amount.