Răspuns:
3x+54-24=x-18
3x+30=x-18
3x-x=-18-30
2x=-48
x=-24
Explicație pas cu pas:
[tex]\bf 3\cdot(x + 18)- 24=x-18\\\\3x+54-24=x-18\\\\3x+30=x-18\\\\3x-x+30=-18\\\\2x=-18-30\\\\2x=-48\:\:\:|:2\\\\\boxed{\bf x=-24}[/tex]
