Question 987292
Let {{{ n }}} = number of hrs she worked for Jones
{{{ 16 - x }}} = number of hrs she worked for Smiths
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{{{ 5*( 16 - n ) + 5.5n = 82 }}}
{{{ 80 - 5n + 5.5n = 82 }}}
{{{ .5n = 2 }}}
{{{ n = 4 }}}
She worked 4 hrs for the Jones
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check:
{{{ 5*( 16 - n ) + 5.5n = 82 }}}
{{{ 5*( 16 - 4 ) + 5.5*4 = 82 }}}
{{{ 5*12 + 22 = 82 }}}
{{{ 60 + 22 = 82 }}}
{{{ 82 = 82 }}}
OK