Question 688435

{{{x/7-x/3=4}}} both sides multiply by LCD of {{{7}}} and {{{3}}} which is {{{21}}} to get a rid of fractions


{{{x*21/7-x*21/3=4*21}}}


{{{x*cross(21)3/cross(7)-x*cross(21)7/cross(3)=84}}}


{{{3x-7x=84}}}


{{{-4x=84}}}


{{{x=84/-4}}}


{{{x=-21}}}