Respuesta :
the correct answer for this very hard equation would happen to be 12 because 18+12 happens to equal 30 and 42-30 just so happens to equal 12
12points
Step-by-step explanation:
Let x be the number of points in the third game
His total number of points is 42
That is
18+12+x=42
30+x=42
x=42-30
x=12