x + 2y = 3
x + y = 1
Subtract second equation from the first to give: 0x + 1y = 2 ie y = 2
Substitute this value of y in the second equation: x + 2 = 1 so that x = -1
The solution is x = -1, y = 2
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2y + 3x = 0 2y + -3 = 0 2y = 0 + 3 , 2y = 3 y = 3/2 y = 1.5 x = -1
y = -1
x = 3 and y = 2
(4, -1)
(-1, 0)