mathematics help: I have a math problem that I don’t know how to solve. - Help.com

The first thing that you need to do is have the same denominator across the whole problem.

OK now that you have that … Whatever you multiplied times the denominator you have to multiply by the numerattor

By chance is this part of your homework from school. Dude, why didn’t you do this on Friday instead of waiting till the eleventh hour?

No it doesn’t equal 30. It still equals one or 30/30.

Now that they have the same denominator they can be added together. Solve 4u/30 = 1 for u. Multiply both sides by 30 and divide by 4.

6u+3u-5u/30=30/30 4u/30=1

The common denominator is 30 so multiply it on the top the same way.

6u/30 + 3u/30 - 5u/30 = 1

Then add the top together so it’s

9u/30 - 5u/30 = 1

then subtract so it’s

4u/30 = 1

then cross multiply the denominator so

4u = 30

then divide the four so it’s

u = 30/4

which is

u = 7.5