16y + 2x = 9
y = 10x
7y - 21x - 9 = 0
y = 6x + 4
0.25x + 0.5y = 4
y - 7x = 14
3y - 15x = 9
2y -10 = 18x
y = 11x - 7
12 = 12x - 3y
4y -8 = 44x
7y = 56x + 49
12y = 36x + 3
6y + x = 12
6y - 30x + 12 = 0
2y = 14x - 12
4y + x = 8
3y = 27x + 11
2y = 4x + 8
10y = 90 - x
