Let x be the number of sheets Raj had before printing.
sheets per copy= 25/2 = 13(round up)
x = 10+ 13(22)
x = 296.
Raj had 296 sheets of paper before printing.
This is the symmetric property of equality, and in a more general form it can be written as: if a=b then b=a.
<span>This is not to be confused with communicative property, which says that the order doesn't matter in some operations, such as addition, and can be written as a+b=b+a</span>
Suppose ABCD has sides a and b. The length of one of ABCD's diagonals is given by a2+ b2 = c2, where c is one of the diagonals.
first equation equivalent to
4x+8y=28
substract with second equation
-2x=22
divide with -2
x=-11
substitute to first equation
8y=28-4(-11)
8y=72
divide with 8
y=9
so the solution is (-11,9)
