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OpenStudy (anonymous):
Given 8r+3s=12 and 7r+2s=9, find the value of 5(r+s)
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OpenStudy (anonymous):
a)5 b)10 c)15 d)20 e)25
OpenStudy (jazzyfa30):
@Trai7
OpenStudy (anonymous):
subtract second equation from first equation and multiply by 5
OpenStudy (anonymous):
8r+3s-7r-2s=12-9 r+s=3
OpenStudy (anonymous):
you 15 right?
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OpenStudy (anonymous):
yes
OpenStudy (anonymous):
thanx ^^
OpenStudy (anonymous):
yw
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