1) Make the x equal the same (find common factor) which is 6 2) Time the whole equation by the factor for example 2x3= 6, times the top equation by 3. The bottom 3x2=6, times the bottom equation by 2:
6x+15y=27 6x-4y=8 (Cancel the x)
Left with: 19y =19 (15- -4y =19y) (27-8=19) Therefore y = 1