quick math question i got stuck on this please help for a mark on brainliest:)

Answer:
you have to change the sign from - to +
Step-by-step explanation:
-1.8 + k = 8.2
k = 8.2 + 1.8
k = 10
Answer:
sorry this is the way that I usually solve these kinds of problems but, She forgot to make -1.5 into a positive. if that makes sense