8•a-6045=1963
8•a=6045+1963
a=8008:8
a=1001
8•1001-6045=1963
1475-x:12=275
x:12=1475-275
x:12=1200
x=1200•12
x=14400
1475-14400:12=275
92:(3•b+5)=4
3•b+5=92:4
3•b+5=23
3•b=23-5
3•b=18
b=18:3
b=6
92:(3•6+5)=4
(240:x+48):26=2
240:x+48=26•2
240:x+48=52
240:x=52-48
240:x=4
x=240:4
x=60
(240:60+48):26=2