Решите уравнения:
( 38+b ) × 12= 840
14 × ( p -30) = 630
(43- s) × 17=289

1)456+12b=84012b=840-45612b=384b=322)14p-420=63014p=630-42014p=210p=153)731-17s=289-17s=289-731-17s=-442s=26

38+b=840/1238+b=70b=70-38b=32p-30=630/14p-30=45p=45+30p=7543-s=289/17-s=17-43s=43-17s=26