Question 916319

{{{-20=-4x-6}}}

{{{-20+4x=-4x+4x-6}}}

{{{-20+4x=-cross(4x)+cross(4x)-6}}}

{{{-20+4x=-6}}}

{{{20-20+4x=20-6}}}

{{{cross(20)-cross(20)+4x=14}}}

{{{4x=14}}}

{{{x=14/4}}}

{{{x=7/2}}}

{{{x=3.5}}}