Решите уравнение 13+3.2x+0.4x=40

Question

Решите уравнение 13+3.2x+0.4x=40

Answer 1

13+3,6x=40
3.6x=27
x=7,5

Answer 2

13+3.2x+0.4x=40
3.2x+ 0.4x=40-13
3.6x=27
x=27/3.6
x=7.5