Answer:
2x+2x is 4 +3x is 12+ 1 is 13 + 3 is 15 - 2 is 13 -1 is 12
so x=15
and y=12
Substituting y=6x+2 into equation 3y - 18x =12 looks like:
3(6x + 2) - 18x = 12
18x + 6 - 18x = 12 distributive property left side
6 = 12 simplifying the left side
We now see a contradiction: 6 does not equal 12 What this tells us is that there is no solutions to this equation. So choice 'C' ...
Answer: x - 2
<u>Step-by-step explanation:</u>
HCF is more commonly referred to as GCF (greatest common factor)
Factor each expression to see which factor(s) they have in common.

The only factor that all three expressions have in common is: x - 2
Not sure but im guessing 6 inches