When a number is trebled and 5 times the number is subtracted,the result is 3.7, what is the number?

9 answers

3 n - 5 n = 3.7

2 n = -3.7

n = -3.7/2
How did the negative cross the equal to sign.

solving it gives n=-1.85
3 n - 5 n = 3.7

2 n = -3.7

n = -3.7/2
3a-5a=3.7
2a=-3.7
Divide both side by 2
a=-3.7/2
a=-1.85
3a-5a=3.7
-2a=3.7
-2a/-2=3.7/-2
a=1.85
The sum of three consecutive numbers is 108
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Nothing
3×a-5×a=3.7
3a-5a=3.7
-2a=3.7
-2a/-2=3.7/-2
a=1.85