One reason would be if you did not know the answer so you could do
4-5=x
another reason would be if the problem gave you the answer but not one of the things to get the answer
4-x=-1
not sure if that is what you want but I hope this helped
Answer:
1. x = 1, -2
2. no solution
3. x = 6 -4
hope this helps!
Step-by-step explanation:
Answer:
(2 decimal places)
Step-by-step explanation:
Quadratic Formula: 
-----------------------------------------------

Plug in values:

First value of x:
(2 decimal places)
Second value of x:
(2 decimal places)
Answer:
See Explanation
Step-by-step explanation:
Your question is incomplete, as the equations or graph or table(s) were not given.
However, I'll give a general way of solving this.
Take for instance, the equations are:


To do this, we start by equating both equations.

i.e.

Collect Like Terms

Take LCM


Cross Multiply


Make x the subject

Substitute 3/4 for x in 



Hence:
