9-7(x+3)=5-4x
9 – 7x – 21 = 5 – 4x
– 7x + 4x = 5 + 21 – 9
-3x = 17
x = 17/-3
х=-5,66666666667
9–7x–21 = 5–4x
-7x+4x = 26– 9
х=-5,67
проверка
-3*(-5,67) = 17
-17,01=17
Ваше решение неверно!!!
9-7(x+3)=5-4x
9 – 7x – 21 = 5 – 4x
– 7x + 4x = 5 + 21 – 9
-3x = 17
x = 17/-3
х=-5,66666666667
9-7(x+3)=5-4x
9–7x–21 = 5–4x
-7x+4x = 26– 9
-3x = 17
x = 17/-3
х=-5,67
проверка
-3*(-5,67) = 17
-17,01=17
Ваше решение неверно!!!