Associative property is the answer.
Julio scored 30 points and Kris scored 10 points which would give us the total score
cant tell direct message me a better picture please
16.2 + -8.4 = 7.8 is your Answer
First, get rid of the parenthesis:
5x-4=5x-15+11
5x-4=5x-4
this equation will always be true, so there are infinite number of solutions.