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oksano4ka [1.4K]
3 years ago
5

If x+y=10 and x - y = 11, what is the value of x - 72​

Mathematics
1 answer:
pentagon [3]3 years ago
8 0

Answer:

x+y=10\\\\x-y=11\\-y=11-x\\y=-11+x\\\\x+(-11+x)=10\\x-11+x=10\\2x=21\\x=10.5

x-72\\10.5-72\\-61.5

The answer is -61.5

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