1)
2x - 3y = - 1
For y = x - 1
So,
2x - 3y = - 1, Subsitution
2x - 3(x - 1) = - 1
2x - 3x + 3 = - 1
- x + 3 = - 1
- x = - 1 - 3
- x = - 4
x = 4 ✔
y = x - 1
y = 4 - 1
y = 3 ✔
So => HP = {x, y} = {4, 3}
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