What is X over 8 =9
1 answer:
Answer: x = 72
Step-by-step explanation: Although the problem is saying "X over 8", this really signifies that the <em>x</em> is being divided by 8 which is what a fraction is, numerator divided by a denominator.
Let's first undo what has been done. Since our variable is being divided by 8, we'll undo that by multiplying by 8 on both sides. It's important to remember, whatever you do on one side,
you <u><em>must</em></u> do to the other side.
If you look now, the 8 in the numerator and the 8 in the denominator will divide out and it will leave us with our variable which is <em>x</em>. Working on the other side now, 9 x 8 is equal to 72 so <em>x = 72</em> is our answer.
We can check our answer by plugging a 72 back into the original equation. So we have 72/8 = 9 which is a true statement
so our answer is correct.
You might be interested in
Answer:
Step-by-step explanation:
We have the two functions: and
.
We want to find .
So, let's use the second function to find first:
Divide:
Add:
Therefore, our expression is the same to .
Now, we can substitute 5 for f(x). This yields:
Multiply:
Subtract:
So:
And we're done!