Răspuns:
Explicație pas cu pas:
2x +3y +3 = 8
5x+5y-y= 2
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2x + 3y = 5 (*5)
5x + 4y = 2 (* -2)
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10x +15y = 25
-10x -8y = -4
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/ 7y = 21
y= 21:7
y=3
2x +3*3 =5
2x= 5-9
x= -2