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Find the measure or angle Y
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1 vote
Find the measure or angle Y

Find the measure or angle Y-example-1
User Thomas Dufour
by
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2 Answers

2 votes
5x + 6 = 8x - 15
21 = 3x
x = 7
5(7)=35+6=41
8(7)=56-15=41
41+41=82
180-82=98
User Ansiwen
by
8.0k points
4 votes
Since it's an isosceles triangle, their base angles must be equal.
5x + 6 = 8x - 15
21 = 3x
x = 7

Now substitute those values in and subtract them from 180 to find Y.
5(7) + 6 = 8(7) - 25
35 + 6 = 56 -25
41 = 41

180-41-41 = 98

Y= 98 degrees
User Eugenekr
by
8.6k points
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