Question

№.524. Решите уравнения.
(38+b)x12=840
14x(p-30)=630
(43-s)x17=280

Answer 1

(38+b)x12=840
38+b=840/12
38+b=70
b=70-38
b=32

14x(p-30)=630
p-30=630/14
p-30=45
p=45+30
p=75

(43-s)x17=289
43-s=289/17
43-s=17
s=43-17
s=26

Answer 2

(38+Б)х12=840
456+12Б=840
12Б=384
Б=32

14х(р-30)=630
14р-420=630
14р=1050
р=75