(4x-250):25+200=350
(4x-250):25=350-200
(4x-250):25=150
4x-250=150•25
4x-250=3750
4x=3750+250
4x=4000
x=4000:4
x=1000
(3567+x)-2072=3081
3567+x=3081+2072
3567+x=5153
x=5153-3567
x=1586
20 000-(3x+100):19+2500=3500
20 000-(3x+100):19=3500-2500
20 000-(3x+100):19=1000
20 000-(3x+100)=1000•19
20 000-(3x+100)=19 000
3x+100=20 000-19 000
3x+100=1
3x=100-1
3x=99
x=99:3
x=33
sper sa fie bine! succes!
