Question 1106393
Let {{{ x }}} = the number that Laura sold
{{{ x - 15 }}} = the number that Kelly sold
{{{ 2*( x - 15 ) }}} = the number that Tia sold
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{{{ x + x - 15 + 2*( x - 15 ) = 83 }}}
{{{ 2x - 15 + 2x - 30 = 83 }}}
{{{ 4x = 83 + 15 + 30 }}}
{{{ 4x = 83 + 45 }}}
{{{ 4x = 128 }}}
{{{ x = 32 }}}
and
{{{ x - 15 = 32 - 15 }}}
{{{ x - 15 = 17 }}}
and
{{{ 2*( x - 15 ) = 2*17 }}}
{{{ 2*( x - 15 ) = 34 }}}
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Kelly sold 17 boxes
Laura sold 32 boxes
Tia sold 34 boxes
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check:
{{{ 17 + 32 + 34 = 83 }}}
{{{ 83 = 83 }}}
OK