1)
11*x = 55*6
11x = 330
x =330:11
x = 30
2)
3*x = 45*8
3x = 360
x = 360:3
x = 120
3)
90*x = 24*15
90x=360
x = 360:90
x = 4
4)
104*x = 117*8
104x = 936
x = 936 : 104
x = 9
5)
3*x = 19,5 * 2
3x = 39
x = 39 : 3
x = 13
6)
7*x = 37,8 * 15
7x = 567
x = 567 : 7
x = 81