x+(2010+2000)=6000
x=6000-(2010+2000)
x=6000-4010
x=1990
х+4010=6000
х=6000-4010
х=1990
1990+(2010+2000)=6000
6000=6000
x+(2010+2000)=6000
x=6000-(2010+2000)
x=6000-4010
x=1990
х+4010=6000
х=6000-4010
х=1990
1990+(2010+2000)=6000
6000=6000