Question

Regra de cramer
3x-y=1
2x-4y=5

Answer 1

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

-y = 1 - 3x
y = -1 + 3x
2x - 4 × (-1 + 3x) = 5
2x + 4 - 12x = 5
2x - 12x = 5 - 4
-10x = -1
10x = 1
x = 1/10

3 × (1/10) - y = 1
3/10 - y = 1
-y = 1 - 3/10
y = 1 + 3/10
y = 10 + 3/10
y = 13/10

Resposta: X= 1/10 e Y= 13/10.