Question

Resolva os sistemas pelo metodo da adição

x-y= 5
x+y= 7

x+2y= 7
x-2y= -5

2x-y= 0
x+y= 15

x-y= 6
x+y= -7

Answer 1

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Ola Santos

x-y= 5
x+y= 7
2x = 12
x = 6
y = 1

x+2y= 7
x-2y= -5
2x = 2
x = 1
2y = 6
y = 3

2x-y= 0
x+y= 15
3x = 15
x = 5
y = 10

x-y= 6
x+y= -7
2x = -1
x = -1/2
-1/2 + y = -14/2
y = -13/2

pronto