pls help. I am not very smart!

Which equation represents this statement?

3 1/3 is the same as the sum of −1/2 times a number and −3

3 1/3+(−1/2)=−3x

3 1/3=−1/2x+(−3)

3 1/3+(−1/2x)=−3

3 1/3=−1/2+(−3x)