Question

/7х-9/+5*/9-7х/ при х 3
/-это модуль

Answer 1

/7х-9/+5*/9-7х/=0

/7х-9/+/45-35х/=0

7х+9+45+35х=0

42х+54=0

42х=-54

х=$\frac{54}{42}$

х=$\frac{27}{21}$

х=1$\frac{6}{21}$