48+30=-78 explain what i did to get this answer. what is the correct answer, and explain how you got it

Where you went wrong:

Instead of adding 30 to -48, you subtracted 30 from -48 and you ended up with -78.

Correct answer with explanation:

-48 + 30 = -18

Simply add 30 to -48, or a more intuitive would be to subtract 30 from positive 48 and then remembering the problem was -48 + 30 so adding the negative sign to get -18.

step-by-step explanation:

i found the koficent of the linear function and i foun c acordind to the strict formula y=kx+c and then i took 2 as an x and replacet it on the formula i found and then foun the y