Question 294402
Starting number:{{{ -8}}}
Second number:{{{-8+x}}}

Third number:{{{-8+x+x}}}

Fourth number: {{{-8+x+x+x=3
}}}
{{{ -8+3x=3 }}}
{{{ 3x=11}}}
{{{x=11/3}}}
So then the sequence becomes,
First number:{{{ -8}}}

Second number:{{{ -8+11/3=-24/3+11/3=-13/3}}}

Third number:{{{ -13/3+11/3=-2/3}}}

Fourth number:{{{ -2/3+11/3=9/3=3}}}