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x + y = -8 | 4x + 4y = -32 +
7x = - 42
x = -42 / 7
x = -6
x + y = -8
-6 + y = -8
y = -8 + 6
y = -2
x - y = -6 - (- 2 )
= -6 + 2
= -4
x+y=-8. Ikali 3I 3x+3y=-24 kurangkan
-7y=-24
y=-2 masukkan ke x+y=-8
x+-2=-8
x=-5
nilai :-)
=-5-(-2)
=-5+2
=-3