Question

quanto e 2x+y=x+2
2(x-2y)=y-3

Answer 1

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

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

x-y= 2x(-2)
2x-5y= -3
------------
-2x + 2y = -4
2x -5y = -3
-----------------
-3y = -7
y= 7/3

x- 7/3= 2
x= 2+7/3
x= 6+7/3
x= 13/3

Answer 2

2x +y = x +2

2x -x +y=2

x- y = 2

2(x-2y)= y-3

2x-4y-y=-3

2x -5y= -3

x-y= 2x(-2)

2x-5y= -3

------------

-2x + 2y = -4

2x -5y = -3

-----------------

-3y = -7

y= 7/3

x- 7/3= 2

x= 2+7/3

x= 6+7/3

x= 13/3

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