Working on this set of questions, and Ive come to two difficult qns, which Im not sure which route I should take at tackling them, its come to a point where Ive written and erased it so many times.. my page has ripped *pressure*

Any help would be greatly appreciated.

Solve for x:

1.

x/m + n = x/n + m

2.

(1/ x + a) + (1 / x + 2a) = 2 /x + 3a

Thank you.