(4x + 7) - 5 = -18 A. x = -5 B. x = 3 C. x = -4 D. x = 5
2 answers:
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Answer:
Step-by-step explanation:
When we solve for an equation, our goal is to find the value of the variable. Any variable can be used, but for the time being let’s assume we use .
We can algebraeically solve equations until we get the value of x - in which we will have x equal to something.
Say we have the equation . Our goal is to find the value of
. <u>We can do this by getting x isolated on one side so we have something equal to x</u>.
We can subtract 5 from both sides and divide both sides by 5.
We now know the value of since it’s on one side of the equation.
Hope this helped!
To find the inverse of any function, switch the x's with y's and vice versa.
The current equation given is
Switch the with
and switch the
with
After doing so, we'll have the following equation:
Now, let's move the variables around so that y is isolated on the left side again.
Subtract both sides by 4y
Subtract both sides by x
Divide both sides by -4
That is the answer.
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