Question

13+3,2x+0,4x=40 Уравнение

Answer 1

13+3.6х=40

3.6х=27

36х=270

х=270/36=7.5

Answer 2

13+3,6х=40

3,6х=40-13

3,6х=27

х=27/3,6

х=7,5