Răspuns :
a) 2/3 = 5/10/x = 2/3 = 1/2x = 2/3 = 1/2x ≠ 0
2/3 = 5/10x
2/3 = 1/2x
4x = 3
x = 3/4
x+1/x+3 = 4/5, x ≠ - 3
5 ( x + 1 ) = 4 ( x + 3 )
5x + 5 = 4x + 12
5x - 4x = 12 - 5
x = 7
Coronița?
2/3 = 5/10x
2/3 = 1/2x
4x = 3
x = 3/4
x+1/x+3 = 4/5, x ≠ - 3
5 ( x + 1 ) = 4 ( x + 3 )
5x + 5 = 4x + 12
5x - 4x = 12 - 5
x = 7
Coronița?