Aidan has put 21 hours of work. To simplify it, Harry worked 7 hours and Aidan worked 7 x 3 times which equates to 21 hours.
Answer:
Hopefully, I am correct is it 1/4??
Step-by-step explains:
(Sorry If I am wrong I just guessed.)
Answer:
x= - 50/9
Step-by-step explanation:
multipy both equations by 12
9x+60=10
then move the constant to the right hand side and change it's sign
9x= 10 - 60
calculate difference
9x = -50
divide both sides by 9
x= - 50/9
350 - 213 - 155 + 78 = 60 students not in either