Question

7-2｛3[4（X-1）-8]-20｝=1求X

Answer 1

7-2｛3[4（X-1）-8]-20｝=1

7-2{3[4x-4-8]-20}=1

7-2{3[4x-12]-20}=1

7-2{12x-36-20}=1

7-2{12x-56}=1

7-24x+112=1

-24x=1-7-112

-24x=-118

x=59/12