For the final days before the election, the campaign manager has a total of $39,000 to spend on TV and radio campaign advertisements. Each TV ad costs $3000 and is seen by 10,000 voters, while each radio ad costs $500 and is heard by 2000 voters. Ignoring repeated exposures to the same voter, how many TV and radio ads will contact 138,000 voters using the allocated funds?
let tv ads = x
radio ads = y
setting up the equations
3000x + 500 y = 39000
10000 x + 2000 y = 138000
so, tv ads = 9
radio ads = 24
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