Частина 1. Номер 637
Розв’яжи рівняння
а) x/8 = 15/24
x/8 = 5/8
x = 5
б) 1/6 = x/24
4/24 = x/24
x = 4
в) 3/x = 9/12
3/x = 9/12
3/x = 3/4
x = 4
г) (x–3)/4 = 1/2
(x–3)/4 = 2/4
x – 3 = 2
x = 5
ґ) (x+1)/5 = 16/20
(x+1)/5 = 4/5
x + 1 = 4
x = 3
д) (x–2)/7 = 15/21
(x–2)/7 = 5/7
x – 2 = 5
x = 7