Solve for x. 6/15=2-x/15 and 2/3+x/5=6

For the first one we have

6/15=2-x/15

So subtract 2 from both sides

You should get 6/15-2=-x/15

Multiply by 15 and you get 6-30=-x

So - 24=-x we then have to multiply by - 1 straight across

So the answer to the first one is x=24

The second one we have 2/3+x/5=6

We want to get x by itself so we subtract 2/3 from both sides

So we now have x/5=6-2/3

Now we multiply by 5 on both sides

So we have x=30-10/3

We know 30 is the same as 30/1

So we multiply the top and bottom by 3 and get

90/3

Now we have x=90/3-10/3

So x=80/3