Step-by-step explanation:
- option d
- option c
- option b
- option d
- option a
<h2>Given :</h2>
<h2>Solution :</h2>

_____________________________

(Cross Multiply)2a+2b=a-b
a=-3b
if b=1; a=-3
correct answer is -3..
Good Luck..
Example :
10+34=
17
+34
_____
1
17
+34
_____
53