Perimeter is the sum of all the sides. So we can set up an equation:

Now solve for 'x', combine like terms:
When it comes to terms with variables it's just like normal addition but we keep the variable:


So we have:

Add:

Subtract 7x to both sides:

Subtract 4 to both sides:

Divide 5 to both sides:
9;9
Explanation:
You divide 18 by 2 to get 9 and divide 27 by 3 to get 9.
Hope that helps!
Answer:
18:23
Step-by-step explanation:
18:23 (cannot be simplified further as there is no common factor)
Answer:
44x,
Step-by-step explanation:
you can expand the brackets which equals 18x + 24 (or subtract 24 if the expression is 6(3x-4)) at the end of the equation you will add 2 which would give you 44x