Seudónimo
Seudónimo
12-04-2018
Mathematics
contestada
plz help!! thanks :))))))
Respuesta :
wizard123
wizard123
12-04-2018
Subtract the equations
x + y = 3.5
-3x -y = -2.5
-----------------------
-2x + 0 = 1
Solve for x
-2x = 1
x = 1/(-2) = -1/2 = -0.5
Sub into 1st equation:
-0.5 + y = 3.5
y = 3.5 + 0.5 = 4
Solution = (-0.5,4)
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