Himpunan penyelesaian system persamaan 7y+5y = 2 dan 5x+7y = -2 adalah

7y + 5 y = 2
12 y = 2
y = 1/6

5x + 7y = -2
5x + 7/6 = -2
5x = -12/6 -7/6
5x = -19/6
x = -19/6 x 5 = -95/6

Hasilnya :
~ 7y+5y=2 , y = 1/6
~ 5x+7y=-2 , x = 2/3