Answer:
I exactly don't know the answer
For this case we have the following system of equations:

We multiply the first equation by -4:

We have the following equivalent system of equations:

We add the equations:

We find the value of the variable "x":

Thus, the solution of the system is:

See the graphic in the attached image
ANswer:

See the graphic in the attached image
2.50 would be 25% out of 100%
Answer:
x = 
Step-by-step explanation:
Given
Ax + By = C ( isolate the term in x by subtracting By from both sides )
Ax = C - By ( divide both sides by A )
x = 
Answer:
it would be 8 to 15
Step-by-step explanation:
you would write it as a fraction 8/15. then, you would try and simplify it. because you cant simplify 8/15 anymore, your answer would be 8/15! hope this helps :)