The answer is 23. Simply add the numbers together arithmetically as you would for the problem two plus two. To check your work, a calculator is the best option.
20 = 400
$3
-20
x+3 = 20 x = 20-3 x = 17
58
if 'g' = minus 3 then 20 + -3 = 17 17 + -3 = 14
-3
i suppose 20 as an answer if its not a trick question.
20
x=3
20
-2x+14=20 x=-3