Answer:
-2x
Step-by-step explanation:
You must perform a subtraction between the result of two multiplications. In fact, since multiplications have a higher priority than subtraction, you must perform them first. Also, remember that a positive times a negative is a negative.
So, you must perform the operations in this order:
If you mean prime factorization, this is it:
Y=x+1
y=-1/2x+4
y=y
x+1=-1/2x+4
1x+1/2x+1=4
3/2x=4-1
3/2x=3
x=3/(3/2)
x=2