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5×-3=2×
2(×+4)+3(×+5)=13


Răspuns :

5X - 3 = 2X
5X-2X = 3
3X = 3
X = 1

2(×+4)+3(×+5)=13
2X+8+3X+15 = 13
5X = 13 - 23
5X = -10
X = -10:5
X = -2