SOLUTION: Rewrite the equation �2x � 5y = �40 as a function of x.

Question 81728: Rewrite the equation �2x � 5y = �40 as a function of x.
Answer by bucky(2189) (Show Source): You can put this solution on YOUR website!
Given:
.
- 2x - 5y = -40
.
Rewrite as a function of x
.
The way to do this problem is simply to solve for y in terms of x and then replace the y
with "f(x)".
.
Let's solve for y
.
Begin by adding 2x to both sides of the equation to eliminate the -2x on the left side. When
you add 2x to both sides the result is:
.
- 5y = 2x - 40
.
Next, solve for y by dividing both sides of this equation by -5, the multiplier of y. When
you divide both sides by -5 you get:
.
y = (2/-5)x -40/-5
.
and this simplifies to:
.
y = (-2/5)y + 8
.
Finally, replace the y with "f(x)" and the equation becomes:
.
f(x) = (-2/5)x + 8
.
That's the answer to the problem. Hope this helps you to understand how to get the f(x) form
of an equation.
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