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D( x )
5*x = 0
5*x = 0
5*x = 0
5*x = 0 // : 5
x = 0
x in (-oo:0) U (0:+oo)
23/(5*x)-(19/(5*x)) = 0
23/(5*x)+(-19/5)*x^-1 = 0
4/5*x^-1 = 0 // : 4/5
x^-1 = 0
x należy do O
x belongs to the empty set
| 7(7x-5)=455 | | 64+38+26+x=180 | | {2*[4-(6/2)]}*6 | | 4-3x=2x+19 | | 4x^2+28-120=0 | | (23)/(5x)=(4)/(x) |