From first condition , 4a = 3b For comparison we can multipy by 2 , then we get 8a=6b . Put 8a=6b in second condition , 6b+5b=22 11b=22 b=2 Put the value of b in condition 2 ...we get 8a+ 5*2=22 a=12/8=3/2
a= 1.5 I guessed.
4a= 3b 8a= 6b
11b= 22 b=2 a= 3*2/4 = 3/2