Operation problem...

[1a2s3d4f5g6h7j8k9l]

hola!!!

"If the operations * and # are defined by:

a*b=ab+1 and a#b=2a-3b

Find the value of 3*[(4#5)*(7#2)] "


Please help! Thanks

 

[tkhunny]

4#5 = 2(4)-3(5) = 8 - 15 = -7

Now what?