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Graphing solutions to two-variable linear equations example 1 | Algebra I | Khan Academy
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To solve this we need to create an equation:
First we have the comission of sales which is 30%: 0,3X where X is the weekly total sales amount.
And the 50$ weekly payment.
So to figure out the total weekly earning:Y , we need to add the sales commissions with the 50$ weekly payment:
Y= 0,3X + 50
And having the weekly sales X, we can easly calculate the total weekly earning.