2x + 3y -z = -6x-2y +2y =10y-x+z = -4Untuk sistem persamaan di atas nilai x+ y + z adalah...

2x - 3y - z = -4
-6x - 2y + 2y = -4
10y - x + z = -4
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-6x - 2y + 2y = -4
-6x = -4
x = -4 ÷ -6
x = -4/-6
x = 4/6
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10y - x + z = -4
10y - 4/6 + z = -4
10y + z = 4 + 4/6
10y + z = 24/6 + 4/6
10y + z = 28/6
y + z = 28/6 ÷ 10
y + z = 28/6 x 1/10
y + z = 28/60
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x + y + z = 4/6 + 28/60
x + y + z = 40/60 + 28/60
x + y + z = 68/60
x + y + z = 1 2/15 (bentuk pecahan campuran)

Maafkalau salah
Jadikan terbaik ya, makasih