Question

Na equação abaixô qual o valor de y (x+y=7 (x-y=3

Answer 1

Resposta:

x+y=7

x-y=3

x+x+y+(-y)=7+3

2x=10

x-10/2

x=5

x+y=7

5+y=7

y=7-5

y=2

Answer 2

Oie, Td Bom?!

{x + y = 7

{x - y = 3

{x + y = 7

{x = 3 + y

• x + y = 7

3 + y + y = 7

3 + 2y = 7

2y = 7 - 3

2y = 4

y = 4/2

y = 2

• x = 3 + y

x = 3 + 2

x = 5

S = {(x , y) = (5 , 2)}

Att. Makaveli1996