<human>:  John's pool is 5 feet deeper than 2 times Sarah’s pool. If John’s pool is 15 feet deep, how deep is Sarah’s pool?
<bot>: Define a variable ** Let x be the number of feet in John’s pool
Write an equation ** 2*x + 5=15
Simplify ** 2x=10
Simplify ** x=<<5=5>>5
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