Question

What is the value of x in the equation 3x – y = 18, when y = 27?

5
7
45
63

Answer 1

it would be 7

Explanation:

3x-1/9=18, y=27

3x-1/9X27=18

3x-3=18

+3 +3

3x=21

divide each by 3

x=7

Answer 2

Okay so we first can take out "y" and put in 27 since the question is stating that y=27.
Now we are going to Add 27 to both of the sides to make the problem look like this:
3x-27+27=18+27
Got it?
Now we have step 2.
Divide 3 by BOTH sides.

And you get 15, Therefore you have x=15