What is the answer to 5+x=-9

Subtract - 9 by 5 and x should be - 14.

5+x=-9

Use the subtractive property of equality to isolate x.

5+x=-9

-5 - 5

x=-14

The value that satisfies x is - 14. You can check your work by substituting x as - 14 and checking if the equation is satisfied.

5+x=-9

x=-14

5 + (-14) = -9

5-14=-9

-9=-9

the answer is correct. Succinctly, x=-14.