Question

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{x/4+y=5/2

{x-y/2=1

Answer 1

1ª equação
mmc(4,2)=4
x + 4y = 10
2ª equação
mmc=2
2x -y = 2
teremos:

x +4y = 10
2x - y = 2 *(4)
x + 4y = 10
8x - 4y = 8
Eliminando a variável y teremos:

9x = 18
x= 18/9
x=2
Como x + 4 y = 10
2 + 4 y = 10
4 y = 10 - 2
4 y= 8
y= 8/4
y= 2