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Precalculus
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OpenStudy (anonymous):
a store sells batteries in packets of 6 or 10. it has a stock of 25 packets containing a total of 186 batteries. how many of these are 10 battery packets?
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OpenStudy (whpalmer4):
We have two equations here. Let S = the number of packets containing six batteries, and T = the number of packets containing ten batteries. Write the equations relating the quantities: \[S*6 + T*10 = 186\]\[S+T=25\] Now solve for S or T by substitution or elimination, then use that value to find the other.
OpenStudy (anonymous):
still dont understand
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