Question 1064773
a-2b=9    (i)
2a+3b=4   (ii)
multiplying eq(i) by 2 and subtracting from (ii)
we have
 2a+3b=4
-2a+4b=-18

7b=-14
b=-2
putting the value of b in eq(i)
we have
a-2(-2)=9
a+4=9
a=5