Question 784496
{{{x}}}= Ted's age now
{{{x+7}}}= Ted's age 7 years from now
{{{x-9}}}= Ted's age 9 years ago
 
The problem says (in words) that
{{{x+7=2*(x-9)}}}
 
This is how we could solve it:
{{{x+7=2*(x-9)}}}
{{{x+7=2*x-2*9)}}}
{{{x+7=2x-18)}}}
{{{x+7+18=2x-18+18)}}}
{{{x+25=2x)}}}
{{{x+25-x=2x-x)}}}
{{{25=x}}}
{{{highlight(x=25)}}}
Ted is 25 years old.
He was 25-9 = 16 years old 9 years ago.
He will be 25+7=32 years old in 7 years.