Justify conclusions: Suppose for some value of ( x ) the solution to the equation ( 2.5(y-x) = 0 ) is ( y = 6 ). What must be true about ( x )? The value of the expression inside the parentheses must be equal to __. So, if ( y = 6 ), ( x ) must be equal to __.
a. ( 2.5 ); ( 6 )
b. ( -2.5 ); ( -6 )
c. ( 6 ); ( 2.5 )
d. ( -6 ); ( -2.5 )