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5x - 20 = 2x +43 -> 5x-2x= 43+20 -> 3x=63 -> x=21 therefore x=21 

(2x+43) + (4y-5x)=180  -> 2x+43+4y-5x=180 (because adjacent angles in a parallelogram equals 180) 

4y-3x=180-43 ...

The number of 0's at the end of a number is the same as the number of factors of 10 that the number has. So consider the prime factor decomposition of 100! and note that every factor of 10 has prime facto...

Must define the term in the question. The Supreme Court has the power to declare actions of the executive, Acts of Congress, acts or actions of state governments and treaties, unconstitutional. However, j...

Recitative is found in oratorios and operas from the Baroque period onwards. Typically, it involves a predominantly syllabic setting of a text to a homophonic accompaniment; it is used for dialogue, narra...

There are two diffrent sides of preparing for the comprehension: firstly, you need to work on your literacy and vocabulary - that means how well and how widely you can read, understand and use words. This...