Penyelesaian Sistem Persamaan linear dua Fariabel 3× - 4y = 22 - x + y dan 5× + y = 5+ 2x - y Adalah
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Jawaban:
3× - 4y = 22 - x + y dan 5× + y = 5+ 2x - y
3x -4y = 22- x + y
3x+x -4y -y =22
4x - 5y = 22................1
5× + y = 5+ 2x - y
5x -2x + y + y = 5
3x + 2y = 5................2
pers 1 dan 2
4x -5y = 22.........x3
3x+2y = 5............x4
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12x - 15y = 66
12x+ 8y = 20
--------------------------(-)
-23y = 46
y = -2
4x - 5y = 22
4x -5(-2) = 22
4x +10 = 22
4x = 22-10
4x =12
x = 3
hp ( 3, -2)
