The value of y in the triangle is 5.
The Triangle WXY and WYZ are congruent, Hence, the measure of its sides are the same .
To solve for y :
2y + 7 = 5y - 8
2y - 5y = -8 - 7
-3y = -15
y = 15/3
y = 5
Therefore, the value of y is 5
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