Question

considere os conjuntos A={-4,-3,-2,-1,0,1,2,3,4} B={-4,-2,0,2,4,6,8}
determine A-B:​

Answer 1

Resposta:

2x - y = 3

x + y = 3

2x - 3 = y

y = 3 -x

2x - 3 = 3 - x

2x + x = 3 + 3

3x = 6

x = 6/3

x = 2

x + y = 3

2 + y = 3

y = 3 - 2

y = 1

Explicação passo-a-passo:

obrigado