solve for both x and y

Question

x+4y=-1

12x+51y=-12

Answer 1

x + 4y = -1

12x + 51y = -12 --- (a)

12x + 48y = -12 --- (b)  (Multiplying eq 1 by 12 throughout)

 

(a)-(b) gives

3y = 0 => y = 0

substituting in eq1 we have x = -1