Pls asap ill give brainliest!

can someone solve this equation tell me how many solutions are possible.. and if there is none possible, how come?

3x - 7 = 4 + 6 + 4x

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

Which recursive formula can be used to determine the total amount of money earned in any year based on the amount earned in the previous year? f(n+1)=f(n)+5

If the sales price of a dvd is $20 and the markup is 34%, what is the cost of the dvd?