Question 852773
This is the way I read it:
Let {{{ c }}} = the cost of the desktop
{{{ c - 400 }}} = the cost of the laptop
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{{{ .085c + .05*( c - 400 ) = 412 }}}
{{{ .085c + .05c - 20 = 412 }}}
{{{ .135c = 432 }}}
{{{ c = 3200 }}}
{{{ c - 400 = 2800 }}}
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The cost of the desktop before finance charges is $3,200
The cost of the laptop before finance charges is $2,800