Question

If X plus X equals Y, then what is X if X plus Y equals 18?

Answer 1

x+x =y, 2x = y

now x+y =18

=x+2x=18

=3x =18

there fore x=6

Answer 2

Answer:

x=6

Step-by-step explanation:

First, lets turn the problem into equations we can solve.

x+x=y

x+y=18

Since we "know" what the value of y is, thanks to the first equation, lets plug in our value of y into the second equation.

x+y=18 (Plug in our value of y)

x+(x+x)=18 (Combine like terms)

3x=18 (Divide both sides to be left with what x equals)

x=6

So, x=6

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