Associative property is dealing with parentahsees and orders it is a(bc)=(ab)c and a+(b+c)=(a+b)+c
so we want the multiplication one
given (10)(5x)(7) we can arragnge these a number of ways (we should use commutative property, but whatever)
first one works, the 7 was moved to front 2nd is wrong, that is a wierd version of the distributive 3rd is right, 5x was moved to the front 4th is wack, no bueno
