Question 387763
Let {{{C}}} = total cost of making {{{x}}} CDs
Let {{{I}}} = total income from making {{{x}}} CDs
given:
{{{C = 6x + 720}}}
{{{I = 10x}}}
The problem is asking "When does the income = cost?"
{{{I = C}}}
{{{6x + 720 = 10x}}}
{{{4x = 720}}}
{{{x = 180}}}
180 CDs must be sold to break even