Please help me. I don´t understand how to do the assignment.

2(n-1)+4n=2(3n-1)n=0no solutioninfinitely many solutions n= - 4 !

The probability that a college student belongs to a health club is 0.3. the probability that a college student lives off-campus is 0.4. the probability that a college student belongs to a health club and lives off-campus is 0.12. find the probability that a college student belongs to a health club or lives off-campus. tip: p(a or b) = p(a) + p(b) - p(a and b) 0.54 0.58 0.70 0.82

What is the result of adding the system of equations? 2x+y=4 3x-y=6