Question

20,15+(20-15)x=20,15+201,5

Answer 1

20,15+(20-15)х = 20,15+201,5
5х =-20,15+20,15+201,5
5х=201,5
х = 201,5/5
х =40,3

Answer 2

20,15+(20-15)x=20,15+201,5
(20-15)x=20,15+201,5-20,15
(20-15)x=201,5
5x=201,5
x=201,5:5
x=40,3
Ответ: x=40,3