billiej billiej

11-02-2017
Mathematics

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a+b+c=180 a=x+25 b=x-5

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apologiabiology apologiabiology

11-02-2017

a+b+c=180
subsittute
x+25+x-5+c=180
2x+20+c=180
minus 20 both sides
2x+c=160
mius 2x
c=160-2x

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