1) 7x * 14 = 49 * 6
7x = (49 * 6) / 14
7x = 21
x=3
2) 10x = 45
x = 4.5
3) 26x = 312
x = 312 / 26
x = 12
4) 14x = 84
x = 84/ 14
x = 6
5) 3/14 * 2/21 = 9x + 31
6/294 - 9114/294 = 9x
- 9108/294 = 9x
x = - 9108/2646 = - 3 1170/2646
6) 9/10 * 5/63 = x + 8
1/14 = x + 8
x = (1 - 112) /14
x = - 111/14
x = - 7 13/14