1-2(1-3(1-4(1-5(x-1))))=100

Question

1-2(1-3(1-4(1-5(x-1))))=100

Answer 1

1-2(1-3(1-4(1-5(х-1))))=100
1-2(1-3(1-4(1-5х+5)))=100
1-2(1-3(1-4+20х-20))=100
1-2(1-3+12-60х+60)=100
1-2+6-24+120х-120=100
-139+120х=100
----->
120х=100+139
120х=239, :120 =1,991(6)     нацело не делится, округляем
х=2