(38+b)*12=840
38+b=840:12
38+b=70
b=70-38
b=32
14(p-30)=630
14p-420=630
14p=630+420
14p=1050
p=1050:14
p=75
(43-c)*17=289
43-c=289:17
43-c=17
c=43-17
c=26
(38+b)*12=840
38+b=840:12
38+b=70
b=70-38
b=32
14(p-30)=630
14p-420=630
14p=630+420
14p=1050
p=1050:14
p=75
(43-c)*17=289
43-c=289:17
43-c=17
c=43-17
c=26