(30142+z):876=49
30142+z=876*49
30142+z=42924
z=42924-30142
z=12782
13x+15x-24=60
28x=60+24
28x=84
x=84:28
x=3
(30142+z):876=49
30142+z=876*49
30142+z=42924
z=42924-30142
z=12782
13x+15x-24=60
28x=60+24
28x=84
x=84:28
x=3