Răspuns:
Explicație pas cu pas:
[tex]\bf 13\cdot \big(x - 17 + 17x - 13\big) = 1989~~~~\bigg|:13[/tex]
[tex]\bf x - 17 + 17x - 13=153[/tex]
[tex]\bf 18x- 30=153[/tex]
[tex]\bf 18x=153+30[/tex]
[tex]\bf 18x=183[/tex]
[tex]\bf x=\dfrac{~183^{(3}~ }{18}[/tex]
[tex]\red{\boxed{\bf x=\dfrac{61 }{6} ~\not\in~\mathbb{Z}}}[/tex]
#copaceibrainly
