Ten increased by the quotient of a number and 2 is -15

Answer 1

"Ten increased by [...] is -15" means we add something to 10 and the result is -15.

"The quotient of a number and 2" means a number divided by 2.

That means the we are looking for a number we divide by 2 and the result of that division added to 10 make it -15.

So the number we need to add to 10 to make it -15 would be -25.

The number we need to divide by 2 to get that -25 would be -50.

Answer 2

(x/2)+10 = -15