Question

240 :( x+3)-5=7

Answer 1

240:(х+3)=7+5

х+3=240:12

х+3=20

х=20-3 =17

Answer 2

240:(x+3)-5=7

240:(x+3)=5+7

240:(x+3)=12

x+3=240:12

x+3=20
x=20-3

x=17

Проверка:

240:(17+3)-5=7

12-5=7

7=7