Question 241664
This would be our equation: {{{1+(18-7x)=-9}}}
Now let's solve for x:
{{{19-7x=-9}}}
{{{-7x=-9-19}}}
{{{-7x=-28}}}
{{{x=-28/-7}}}
{{{x=4}}}
.
Check:
{{{1+(18-7x)=-9}}}
{{{1+18-(7*4)=-9}}}
{{{19-28=-9}}}
{{{-9=-9}}}
.
Done!