Inequality, finding Y

Question

Three times the sum of a number,Y, and 5 is at most 36. Write inequality and solve Y.

Answer 1

(3) (y + 5) is less than or equal to 36

multiplying gives 3y + 15 is less than or equal to 36.

Then 3y is less than or equal to 36 - 15, so 3y is less than or equal to 21.

Divide both sides of the equation by 3, gives y is less than or equal to 7.

Answer 2

3(y+5)≤36 is the required inequality.