3x° = (5x-20)° [Interior Alternate Angle]
=> 3x° = 5x° - 20°
=> 5x° - 3x° = 20°
=> 2x° = 20°
=> x° = 
<h3>=> x° = 10°</h3>

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Y=0
x=5
Example : 3x+8y=15
3(5)+8(0)=15
15+0=15
15=15
Answer:
the triangle
Step-by-step explanation:
You can see it. When you cut the shape there, it makes a triangle shape on the place where it is cut right?