The total average age of three friends is 40. Jared is ten years older than Hakimi, and Molly's age is 30. How old is Hakimi?
How old are the three friends? ** The total age for the three friends is 40*3 = <<40*3=120>>120
How old are Jared and Hakimi? ** If Molly's age is 30, then Jared and Hakimi have a total age of 120-30 = 90.
Define a variable ** Let's say the age of Hakimi is x.
How old is Jared? ** Since Jared is 10 years older than Hakimi, Jared is x+10 years old.
How old are Jared and Hakimi? ** Jared and Hakimi's total age is x+(x+10) = 90
Write an equation ** This translates to 2x=90-10
Simplify ** 2x=80
Divide by 2 ** Hakimi's age is x=80/2
How old is Hakimi? ** This gives us x=<<40=40>>40, which is Hamkimi's age.
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