Answer:
Step-by-step explanation:
57.6
Times the bottom equation by -4 to cancel out the x’s.
Add the equations.
Solve for y.
Plug in y to find x.
4,000 in bank -500 and 15000 so she had -20000 +4000 so it equals -16000
Associativity means
(A+B)+C=A+(B+C)=A+B+C
Substitute A=9, B=8, C=32 to apply to this problem.