Question 985242

first, the sum of a number {{{x}}} and {{{7}}} is:{{{x+7}}}

if the sum of a number {{{x}}} and {{{7}}} is tripled, we have: {{{3(x+7)=3x+21}}}

if the results is {{{2}}} less than {{{twice}}} the number, we have:{{{3x+21=2x-2}}}

solve for {{{x}}}

{{{3x+21=2x-2}}}

{{{3x-2x=-2-21}}} 

{{{x=-23}}}

check:

{{{3x+21=2x-2}}}

{{{3(-23)+21=2(-23)-2}}}

{{{-69+21=-46-2}}}

{{{-48=-48}}}