Answer:
x= 4/3
Step-by-step explanation:
Subtract 3/7 from both sides
-x= 2x-28/7
simplify
-x=2x-4
Subtract 2x from both sides
-3x=4
divide both sides by -3
x= 4/3
So a straight line equals 180 degrees so you need to subtract the 69 degrees from 180 to get 111 degrees
You then need to subtract the 1 from 111 to get 110
Now the missing angle is
5x=110
You then divide 110 by 5 to get 22
X=22
I agree with ZOMBIE0O That the question is somewhat confusing. I see two options as being possible, depending on the nature of the question. The first option, 49, is a possibility. This would be the answer if the second two numbers were insignificant to the number of books (for example, if it were describing the dimensions of the books as 5•40). The second option is also a possibility, if the question is wanting you to add (49•5)+(5•40).
