Question

Me ajudem?
2X + Y = 10
X + 3Y = 2

Obrigadoooo

Answer 1

2x + y = 10   (a)
x + 3y = 2     (b)

Multiplique (b) por 2:

2x + y = 10   (a)
2x + 6y = 4   (b)

Subtraia (a) - (b):

-5y = 6
y = -6/5

Substitua y em (b)

x +3.(-6/5) = 2
x - 18/5 = 2
5x - 18 = 5
5x = 5 + 18
5x = 23
x = 23/5