Question

Suma y resta de 2x+3y=13. x-4y=-10​

Answer 1

Respuesta:2x + 3y = 13

-x + 4y = 10 (2)

2x + 3y = 13

-2x + 8y = 20

============

11y = 33

y = 33/11

y = 3

2x + 3y = 13

2.3 + 3y = 13

6 + 3y = 13

3y = 13 - 6

3y = 7

y = 7/3

s={ 3, 7/3 }

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