Question 206194
"In 3 years Alex is 3 times older than Kit."
let x = Kit's age in 3 years
3x = Alex's age in 3 years
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"A year ago Alex is 7 times older than Kit.
3x-4 = 7(x-4)
Solve for x.
{{{3x-4=7(x-4)}}}
{{{3x-4=7x-28}}}
{{{24=4x}}}
{{{x=6}}}
So x-3 = 3 is Kit's age now, and 3x-3=15 is Alex's age now