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ArbitrLikvidat [17]
3 years ago
15

#13 please help I don’t know how to do it

Mathematics
1 answer:
Kruka [31]3 years ago
8 0
2x+5x-4=31
7x-4=31
7x=35
X=5

ST=5x-4= 5.5-4=25-4=21
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