The number is 9, because 9 + 2/3(9) is 15, so 9 + 6 = 15 because 2/3 of 9 is 6.
x+15
2*(15 + N)
Their sum is 15.
20. Method: call the unknown number n. From the problem statement, 3n + 15 = 75, or 3n = 75 -15 = 60 and n = 60/3 = 20.
225
27
The sum is 328.
? + 7 = 15 so 15 - 7 = ?
N + 15
x+15
five times the sum of a number and 8 is -15.
2*(15 + N)
Their sum is 15.
x+15 if you are trying to find the value of x it would be x+15 x=-15
15
It is 15 + 1x.
Average = sum/number = 153/4 = 38.25