Well one example is that we know 5*9 is 45. So 45+9=54. So, 6*9=54
U is 10. If you subtract 11 first to get the variable and it's coefficient on its own, you see that 3u=30. To get the u on its own, you divide both sides by three. This gives you u=10
Step-by-step explanation:
total problems = 17+28=45
If she ca finish five problems in 20 minutes,
so...
for 45 problems
she take 45/5*20=180 minute = 3hour
the question is not very clear.......
