why am i so dum if your the first to answer with a good answer you may get

your not dum your smart we all are in our own way you just got to believe in your self and be confident in your self like i do i promise you your not dum

Step-by-step explanation:

-2

7 - 9 = -2

reversed:

-2 + 9 = 7

this linear equation would have just one solution.

step-by-step explanation:

the reason why this would have one solution is that it is an expression with just one variable. since that variable is not raised to a power, it will always have just one solution.