Anonymous

x - 12y = -210 x - 6y = 90 6y = 300 y = 50 x = 390

Anonymous

x - 12y = -210 x - 6y = 90 6y = 300 y = 50 x = 390

Anonymous

x - 6y = 90 x - 12y = - 210________subtract 6y = 300 y = 50 x - 300 = -210 x = 90

Anonymous

If x-12y = -120 and x-6y = 90 then x = 300 and y = 35

Anonymous

x - 12y = -210 x = 12y - 210..........(1) x - 6y = 90 x = 6y + 90 .............(2) (1) - (2) = x - x = 0 0 = 12y - 210 - (6y + 90) = 6y - 300 y = 300/6 = 50 x - 12(50) = -210 x = -210 + 600 = 390

Anonymous

x = (-210×-6 - -12×90)/(1×-6 - -12×1) = (1260 + 1080)/(-6 + 12) = 2340/6 = 390

Anonymous

x - 12y = -210 …… [1] x - 6y = 90 …… [2] [2] × 2 : 2x - 12y = 180 …… [3] [3] - [1]: (2x - 12y) - (x - 12y) = 180 - (-210) 2x - 12y - x + 12y = 180 + 210 x = 390