327-20·x=267
20·x=327-267
20·x=60
x=60:20
x=3
48·x+568=1000
48·x=1000-568
48·x=432
x=432:48
x=9
425÷x+432=437
425÷x=437-432
425÷x=5
x=425÷5
x=84
980-360÷x=890
360÷x=980-890
360÷x=90
x=360÷90
x=4
948-x:3=586
x:3=948-586
x:3=362
x=362·3
x=1086
2000:x-40=60
2000:x=60+40
2000:x=100
x=2000:100
x=20