Find the value of x
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Answer:
from my pic below,
you know that ∠ABC = 90°.
90° = (x+15)° + (3x - 17)°
= x +15 +3x - 17
= x +3x + 15 - 17
= 4x - 2 .
90 +2 = 4x
92 = 4x
92/4 = x
23 = x
∠ABD = 23 +15
= 38°
∠DBC = 3 × 23 - 17
= 52°
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Step-by-step explanation:
x+15+3x-17=90°
4x-2=90
2 (2x-1)=90
2x-1=45
2x=45+1
2x=46
x=23
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