Question 978759
Let {{{ b }}} = number of birds in store
{{{ 52 - b }}} = number of cats in store
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{{{ 2b }}} = number of the bird's legs Kali counts
{{{ 4*( 52-b ) }}} = number of cat's legs Kali counts
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{{{ 2b + 4*( 52-b ) = 138 }}}
{{{ 2b + 208 - 4b = 138 }}}
{{{ 2b = 208 - 138 }}}
{{{ 2b = 70 }}}
{{{ b = 35 }}}
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{{{ 52 - b = 52 - 35 }}}
{{{ 52 - b = 17 }}}
There are 35 birds and 17 cats in the store