Answer:
angle a is 45 degrees
Explanation:
triangle total angles must add up to 180
angle a: 8x+5
angle 2: 85
angle 3: 10x
8x+5+85+10x=180
simplify
18x+90=180
subtract 90
18x=90
divide by 18
x=5
plug in x to angle a
8*5+5=45
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