I need to be able to see the question for me to answer. Unless you mean like, what you actually are. I would think you're subtracting numbers. :/
Answer:
x = -52
Step-by-step explanation:

Let us solve for x.





Use cross multiplication to find the value of x.



Divide both sides by 3.
x = - 52
4:5 = x : 15
let x be blue marbles
4(15) = 5x
x = 12
therefore 12 blue marbles
Answer:
x = minus two
Step-by-step explanation:
5x+3 = 2x-3
5x-2x = -3-3
3x = -6
x = -6÷3
x = -2
The birthday would have been on saturday