Question

x+y=11
x-
y=3

x+y=6
2x+y=4

3x+y= 5
2x+y= 4

x-y= 6
x+y= -7

x= 5-3y
2x-y= -4

x-3= -y
3x+2= y +3

Answer 1

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Ola Maria

x + y = 11
x - y = 3
2x = 14
x = 7
y = 4

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x + y = 6
2x + y = 4
x = -2
y = 8

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3x+y= 5
2x+y= 4
x = 1
y = 2

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

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x = 5 - 3y
2x - y = -4
10 - 6y - y = -4
7y = 14
y = 2
x = 5 - 3y = 5 - 6 = -1

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x - 3 = -y
3x + 2 = y + 3
x + y = 3
3x - y = 1
4x = 4
x = 1
1 + y = 3
y = 2

pronto