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-BARSIC- [3]
3 years ago
12

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

Mathematics
1 answer:
leva [86]3 years ago
3 0
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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