Answer:
x=13
Step-by-step explanation:
The parallel sides on a parallelogram are equal, therefore you must find a number that would satisfy the requirement for equality in the sides' length
So lets get started by finding out what number would be 24 after 12 has been subtracted from it.
24+12=36
Now we need to find out how to get 36 from 3x
36/3=13
13.
x is 13.
Now lets check that our answer is right
13x3=36
so far so good.
36-12=24
That checks out.
24=24.
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