SoldiersOnly123
SoldiersOnly123
25-05-2017
Mathematics
contestada
-2x + 3y=-1 2x + 5y=25 elimination
Respuesta :
Аноним
Аноним
25-05-2017
-2x + 3y=-1
2x + 5y=25
------------------add
8y = 24
y = 3
-2x + 3y =-1
-2x + 3(3) =-1
-2x + 9 = -1
-2x = -10
x = 2
answer
x = 2 and y = 3 or (2,3)
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4x - y - 2z if x = -2, y = 3, and z = -2
