21(18+х)=714
18+х=714:21
18+х=34
х=34-18
х=16
.
16(4х-34)=608
4х-34=608:16
4х-34=38
4х=38+34
4х=72
х=72:4
х=18
.
12(152+19х)=2052
152+19х=2052:12
152+19х=171
19х=171-152
19х=19
х=1
.
(152х+32)*6=192
152х+32=192:6
152х+32=32
152х=32-32
152х=0
х=0:152
х=0
