Savannah has $5 in her wallet. she owes her brother $20 and owes her sister $18. she earned $25 babysitting. write a numerical expression that expression that represents savannah's financial situation?

18a

step-by-step explanation:

simply because it is. it's the highest common factor

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.