Solve this problem - 12x + 18y=6 and this one - 14x + 21y=21 by elimination

-12x + 8y = 6 is equivalent to

2x - (4/3) y = - 1 ... (i)

-14x + 21y = 21 is equivalent to

-2x + 3y = 3 ... (ii)

(i) + (ii) : (5/3) y = 2

y=6/5

Then 2x = 3 - 18/5 = - 3/5

x=-3/10

Hence x=-3/10, y=6/5