Please help Identify the LCD of the rational expressions in the equations

2/x+1 + x/x+4 = 1/2

4/x+9 + 3x/2x-1 = 10/3

I’d love it if anyone could answer both equations, but anything helps really!!!

Mario has $14.35 left in his wallet. he spent $148.43 for tablecloths. then, he spent $92.05 for napkins. how much money did mario have in his wallet to start with?

Campus rentals rents 2 and 3 bedrooms apartments for $700 ans $900 a month respectively. last month they had six vacant apartments and reported $4600 in lost rent. how many of each type of apartment were vacant?

Atorch and a battery cost 2.50 altogether.the torch costs 1.50 more than the battery.what fraction of the total price is the torch? give your answer in its simplest form.