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4x - 7y = -2 x 1
sehingga,
4x + 6y = 24
4x - 7y = -2
kurangkan kedua persamaan tersebut :
6y -(-7y) = 24 -(-2)
6y + 7y = 24 + 2
13y = 26
y = 2
substitusikan y = 2 ke 2x + 3y = 12
2x + 3(2) = 12
2x + 6 = 12
2x = 12 - 6
2x = 6
x = 3
jdi titik potongnya adalah (3,2)