Question

(3×-10)•4=20 решите уравнение

Answer 1

12x-40=20
12x=20+40
12x=60
x=60:12
x=5
Ответ: x=5

Answer 2

12x40=20

Answer 3

(3х-10)*4=20
12х-40=20
12х=20-40
12х=-20
х=-20/12
х=-5/3