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2x+1,4(x+5)= 2,4(x+5)

Răspuns :

2x+1,4x+7=2,4x+12
3,4x-2,4x=12-7
X=5
2x + 1,4x + 7 = 2,4x + 12
2,4x - 1,4x - 2x = 12 - 7
1 - 2x = 5
-x = 5 => x = -5