Call the number x.
Three times the number is 3x.
The sum of 3x (three times the number) and 4 is 3x+4.
Is between -8 and 10 is -8 < 3x+4 < 10.
Solve both inequalities.
3x+4>-8
3x>-12
x>-4
3x+4<10
3x<6
x<2.
The solution is -4 < x < 2
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