Answer:
13-4y
Step-by-step explanation:
Without a second equation it is impossible to give a numerical value for x, but x can be expressed in terms of y.
This equation is called a "literal equation" since there are more than one variable, but only one equation (it is not a system of equations).
Therefore, solve for x by subtracting 4y from both sides:
x+4y=13
-4y -4y
x=13-4y
