Question

if a number is added to twice the number, the result is -30. what is the number?

is this correct? x+2x=-30
3x=30
x=10

Answer 1

i got -10

Answer 2

i got it right

Answer 3

Remember to keep the negative sign. So you should end up with -10, not +10, but otherwise it looks good.

Looks like you just realized that :)