i neeeeeeeeeeeeeeeeed help

write an equation and solve

Job A pays 400$ per week plus a 20% commission on everything sold. Job B pays 500$ per week plus 15% commission on everything sold.
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1 Answer

Let S=sales.

A=400+S/5 and B=500+3S/20; A=B so 400+S/5=500+3S/20.

S(4-3)/20=100, so S=$2000. So he would have to sell $2,000 worth of goods to receive the same pay ($800).

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