statistika : tolong bantu tentukan nilai x nya ya..trims

a. (5*1 + 6*5 + 7*6 + 8x + 9*3 + 10*1) : (16 + x) = 7.3
114 + 8x = 7.3 * (16+x)
114 + 8x = 116.8 + 7.3x
8x - 7.3x = 116.8 - 114
0.7x = 2.8
x = 2.8 : 0.7
x = 4

b. modus = 7
median = 7