Question

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

Answer 1

1)456+12b=840
12b=840-456
12b=384
b=32
2)14p-420=630
14p=630-420
14p=210
p=15
3)731-17s=289
-17s=289-731
-17s=-442
s=26

Answer 2

38+b=840/12
38+b=70
b=70-38
b=32

p-30=630/14
p-30=45
p=45+30
p=75

43-s=289/17
-s=17-43
s=43-17
s=26