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I NEED HELP!! pleaseee

I NEED HELP!! pleaseee-example-1

1 Answer

5 votes

Answer:

y = 20

Explanation:

line RPN = 180 = 4y - 10 + 90 + y

180 - 90 + 10= 5y

100 = 5y

y = 100/5

y = 20

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