20 - 3*7 + 2*6 = 20 - 21 + 12 = -1 + 12 = 11.
It's seriously the EASIEST math can get, plug it in a calculator or even better, do it by hand or something. It doesn't take a minute even.
a=7 b=6
20-3a+2b=
1 answer
20-3a+2b=
1 answer