Question

????????????????????????? ​

Answer 1

For the first one the answer is
(a)x2+y3=20

Apko sirf pehele and dusre equations ko square karna h alag alag
aur fir dono ko add kardena h.. it is literally very easy!

Asha karti hu apko samjh aagaya hoga...
and dusra wala mujhe ques samjh nahi aaya h..isliye nahi aata

par pehele wala kia h

All the best buddy :))