Question

как решить уравнения 240 :(х+3)-5=7

Answer 1

240:(х+3)-5=7
240:(х+3)=7+5
240:(х+3)=12
х+3=240:12
х+3=20
х=20-3
х=17

Answer 2

240 : (х + 3 ) - 5 = 7
240 : (х + 3) = 7 + 5
240 : (х + 3) = 12
х + 3 = 240 : 12
х + 3 = 20
х = 20 - 3
х = 17

проверка:
240 : (17 + 3) - 5 = 7
240 : 20 - 5 = 7
12 - 5 = 7
7 = 7