2*(n+15) = 6n
five times the sum of a number and 8 is -15.
(1+15)*15/2first plus last times number of numbers then divide by two
(15+7) +99
27
The two numbers that solve this problem are 5 and 15. The sum of 5 and 15 is equal to 20, and 15 is indeed 3 times 5.
The sum of 45 and 15 equals 60. 15 x 3 equals 45.
2*(n+15) = 6n
five times the sum of a number and 8 is -15.
(1+15)*15/2first plus last times number of numbers then divide by two
(15+7) +99
27
No because two plus 15 equals 17
19
12 & 15
five
5*(3+x)=15+5x Fifteen plus five times that number