anonymouspb3 anonymouspb3
  • 10-02-2018
  • Mathematics
contestada

Solve the system of linear equations by linear combination:
4x + 3y = 5
2x - 3y = 7

The solution is ( , )

Respuesta :

qumpelka
qumpelka qumpelka
  • 10-02-2018
[tex] \left \{ {{4x + 3y = 5 } \atop {2x - 3y = 7}} \right. [/tex]

6x = 12 
x = 2

4*2 + 3y = 5 -> 8 + 3y = 5 -> 3y = 5 - 8 -> 3y = -3   -> y = -1

2*2 - 3y = 7 -> 4 - 3y = 7  ->  -3y = 7-4  =  -3y = 3  -> y = -1


x = 2
y = -1
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