You always have to switch the inequality symbol when dividing by a negative because a negative always negates a number's (other than 0) original sign.
Sam’s Club is better. If you divide 10 by 2, that’s 5 cans. You would then divide $7.10 by 2 to get the cost of 5 cans, which is $3.55 per can.
First, we calculated the discounted price which would have been paid by Keith. That is the product of 85% and $36,000.
($36,000) x (85%) = $30,600
Then, after negotiating to pay 9% off the sale price, he will only need to pay 91% of the sale price. The new price would be,
($30600) x (0.91) = $27846
Thus, Keith will only need to pay $27,846.
<u> 3x + y = 25</u>
To solve for 'y' ...
Subtract 3x from each side: <em> y = 25 - 3x</em>
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<u>3x + y = 25</u>
To solve for 'x' ...
Subtract 'y' from each side: 3x = 25 - y
Divide each side by 3 : <em>x = (25 - y) / 3 </em>
