Question

A) X+4=11
X - y= 3

B) x + y = 6
2x + y = 4

C) 3x + y = 6
2x + y = 4

D) x -y = 6
X + y = 7



Me ajudem por favor

Answer 1

Vamos lá.

A)

x + y = 11

x - y = 3

2x = 14, x = 7

y = 11 - 7 = 4

B)

x + y = 6

2x + y = 4

x = -2

-2 + y = 6

y = 8

C)

3x + y = 6

2x + y = 4

x = 2

y = 0

D)

x - y = 6

x + y = 7

2x = 13

x = 13/2

13/2 + y = 14/2

y = 1/2