What is the easiest way to solve for x. (these are fractions, not dividing)

Question

4/15=x/5 would I find the common denominator or cross multiply

and

x/3=x+10/6 same question

Answer 1

1) multiply each side by 5
2) multiply both sides by 6
subtract 6x from each side
multiply each side by -1

Answer 2

Thank you.

So is
1) x=1 1/3
2)x=10