Question

B)
5x-8y=4
-5x+10y=0

Answer 1

Resposta:

x = 4;

y = 2;

Explicação passo-a-passo:

5x - 8y = 4

4 + 8y = 5x

-5x + 10y = 0

-(4 + 8y) + 10y = 0

-4 -8y + 10y = 0

-4 + 2y = 0

2y = 0 + 4

2y = 4

y = 4/2

y = 2

4 + 8y = 5x

4 + (8 × 2) = 5x

4 + 16 = 5x

20 = 5x

x = 20/5

x = 4