The second angle of a triangle is three times as large as the first. The measure of the third angle is 40 degrees greater than that of the f

The second angle of a triangle is three times as large as the first. The measure of the third angle is 40 degrees greater than that of the first angle. How large are the angles? (with solution pls)
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Guest [Entry]

"1st= n
2nd= 3n
3rd= 40+n

180= n+3n+40+n
180= 5n+40
5n= 140
28=n

1st angle is 28
2nd angle is 28×3= 84
3rd angle is 28+40= 68

;)"