I need this answer following the order of operation. Please help!

What does x = in this equation x+3+2x=x+5

This summer the number of tourists in salem increased 4.5% from last years total of 426000. how many more tourists came to salem this summer

Anew test for ra is being developed. the test is administered to 750 patients with ra and 750 without ra. for the sake of the question, assume the prevalence of ra in this population is 50%. of the 750 patients with ra, 575 have a positive result. of the 750 patients without ra, 150 have a positive result. what is the positive predictive value of the new test? a575/(575+150) b. 600/(600+ 150) c. 575/(575+125) d. 600/(600+ 125)