Answer:
x=8
Step-by-step explanation:
start by setting angle a equal to angle b
next add 21 to the opposite side
then subtract 2x from the opposite side
finally you're left with x=8
Answer: 
Step-by-step explanation:
The formula for area of a triangle is 
Now we have to isolate for w.
First multiply by the 2 which is the reciprocal of 1/2 to cancel it out.

Now divide by h to isolate w.
1 (B), because 3+-2=1, and 5+-4=1, which amounts to 1/1, or whole number 1.
Given:


Multiply both sides by 3/2, we get

Cancel out the common multiples, we get



The solution of the given equation is

or
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