1)12b-7b+4b=747
b(12-7+4)=747
9b=747
b=747/9
b=83
2)14m-9m+42=3062
m(14-9)=3062-42
5m=3020
m=3020/5
m=604
1)12b-7b+4b=747
b(12-7+4)=747
9b=747
b=747/9
b=83
2)14m-9m+42=3062
m(14-9)=3062-42
5m=3020
m=3020/5
m=604