2x+y=18, x-y=6; Solve the simultaneous equations
- 2x+y =182) x-y =6(x-y=6) multiply by +22x-2y = 121) 2x+y = 182) 2x-2y=12 -subtract equation 2 from equation 10x-y=6 -Therefore -y=6 so y= -6Put value for y into either of the equation in order to find value for xSo: 2x + (-6) = 18 2x - 6 = 18 2x = 24 x = 24/2 x = 12Therefore x=12, y=-6
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