а)(х-152)*59=6018
б)(30142+z)/876=49
в)13х+15х-24=60
Х-152*59=6018 59х-8968=6018 59х=8968+6018 59х=14986 х=14986:59 х=254
(30142+z)/876=49; 30142+z =49 * 876; 30142+z =42924; z = 42924 - 30142; z = 12782;