Answer:
q=-14
Step-by-step explanation:
honesty you cant realy use a calculator because you need to meadian mode and range them first
idk but I hope you the best of luck
5x + X/3 = 38.4
or, 5x* 3 + X = 38.4*3
or,. 15x + X. = 115.2
or,. 16 X. = 115.2
or,. X. = 115.2/16
X = 7.2