10(2х-1)-9(х-2)+4(5х+8)=71
20х-10-9х+18+20х+32=71
20х-9х+20х=10-18-32+71
31х=31
х=1
:10(2х-1)-9(х-2)+4(5х+8)=71
31х+40=71
31х=71-40
х=10000000000000000
10(2х-1)-9(х-2)+4(5х+8)=71
20х-10-9х+18+20х+32=71
20х-9х+20х=10-18-32+71
31х=31
х=1
:10(2х-1)-9(х-2)+4(5х+8)=71
20х-10-9х+18+20х+32=71
31х+40=71
31х=71-40
31х=31
х=10000000000000000