Question

qual resultado do sistema de equaçao -2x +3y = 1
4x - 5y =0

Answer 1

- 2x + 3y = 1  ( x 2)
4x - 5y = 0

-4x + 6y = 1       (+)
4x - 5y = 0

y = 1

4x - 5 x 1 = 0
4x - 5 = 0
4x = 5
x = 5/4

Answer 2

{2x-3y=1
{4 x -5y

1 3
{ x= --- + ----y
2 2
{ 4x -5y=0


4 ( 1. 3 ) -5 y=0
---- + ----y
2. 2

Y = -2

4x -5 x (-2)=0


5
X = - ----
2


5
(X,y)= - ----- , -2
2

Simpli :

5
2x - ( ----) -3x (-2) =1
4

5
4x. ( - -----) - 5x (-2)=0
2

{1=1
0=0

5
(X,y)=( - ---- , -2)
2