A window cleaner has enough supplies to clean 21 windows per office building on a certain number of buildings. They can also clean the windows of a school with 42 windows. Altogether, there are enough supplies to clean 126 windows. How many office buildings can be washed? Identify the equation that would be used to solve this problem algebraically. (1 point)
• 42% - 21 = 126
• 42x + 21 = 126
0 21% + 42 = 126
• 21% - 42 = 126
The equation that would be used to solve this problem algebraically is 42x + 21 = 126, where x represents the number of office buildings that can be washed.
The equation that would be used to solve this problem algebraically is:
42x + 21 = 126
where x represents the number of office buildings.
To solve this problem algebraically, let's represent the number of office buildings as "x".
We are given that a window cleaner can clean 21 windows per office building. Therefore, the number of windows cleaned in the office buildings would be 21x.
We are also given that there is a school with 42 windows that can be cleaned. Hence, the total number of windows cleaned in the office buildings and the school is 21x + 42.
We are told that there are enough supplies to clean 126 windows in total. So, we can set up the equation:
21x + 42 = 126
This equation represents the problem algebraically.
Therefore, the correct answer is: 42x + 21 = 126