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The river level was 2 cm above normal at the beginning of the month, then it rose by 5 cm, in the following days it fell by 12 cm, then it fell by 9 cm, and finally, it rose by 7 cm. How high was the river level at the end of the month?

Correct answer:

x =  -7 cm

Step-by-step explanation:

x=2+5129+7=7 cm

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