Answer:
The equation can be used to find the amount of time Hiroshi spends on his math homework is 1/4 (30 + 60 + x) = x ⇒ answer a
Step-by-step explanation:
* Lets read the problem and take the information to solve the problem
- Hiroshi spends 30 minutes on history homework
- Hiroshi spends 60 minutes on English homework
- Hiroshi spends  x minutes on math homework
* From these information
- The total homework time is (30 + 60 + x) minutes
- Hiroshi spends one fourth of his total homework time on math
- The time of math homework is 1/4 the total homework time
∵ The total homework time = (30 + 60 + x)
∵ The time of math homework is 1/4 the total homework time
∴ The time of math homework = 1/4 (30 + 60 + x)
- Then equate the times of math homework
∵ Hiroshi spends  x minutes on math homework
∵ The time of math homework = 1/4 (30 + 60 + x)
∴ 1/4 (30 + 60 + x) = x
* The equation can be used to find the amount of time Hiroshi
 spends on his math homework is 1/4 (30 + 60 + x) = x
