Please solve both equations for x

11x-4=14+9x

11x - 9x= 14 + 4

2x = 18

divide both sides by 2

2x ÷ 2 = 18 ÷ 2

x = 9

(15,12) would work but the total is 600. (13,11.5) would work and the total is 547.5. (10,13) would work because the total is 525. the rest of the options won't work because the order of large jackets is not twice less than the number of small jackets. Hope that helps.