Find the value of 4( a+3b)-2(3a-4b),when a=5 & b =2​

Answer :

4( a+3b)-2(3a-4b)

= 4(5 + 3×2)-2(3×5-4×2)

= 4(5+6)-2(15-8)

= 4×11-2×7

= 44-14

= 30