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b)
3(x + 2) - 2y = 2
3x + 4(7 -- y) = 26​


Răspuns :

3(x+2)-2y=2 =>3x+6-2y=2

3x+4(7-y)=26 3x+28-4y=26

=>3x-2y=2-6 =>3x-2y=-4

3x-4y=26-28 3x-4y=-2

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

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

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

-2y=+2 y=-1

=>3x=-4+2(-1) => 3x=-4-2

y=-1 y=-1

=>3x=-6 => x=-2

y=-1 y=-1

Răspuns:

3(x+2)-2y=2

3x+6-2y=2

3x-2y=2-6

3x-2y=4