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Sagot :
Answer:
x=11∘
Step-by-step explanation:
So to do this, you need to understand that the sum of angles in a triangle is 180∘. If we understand this, we can add up all of the angles in ΔGHI and make the sum 180∘ to get an algebraic equation:
10x+9+3x+13+x+4=180 - Combine like terms
14x+26=180 - subtract 26 on both sides
14x = 154 - divide by 14 on both sides
x=11∘
Please mark brainliest if this helped
Answer:
[tex](10x + 9) \degree + (3x + 13) \degree + (x + 4) \degree = 180 \degree \\ 10x + 3x + x + 9 + 13 + 4 = 180 \degree \\ 14x + 26 = 180 \\ 14x = 180 -26 \\ 14x = 154 \\ x = \frac{154}{14} \\ \boxed{x = 11} [/tex]
To test subtitle 11 in x, your angles should add up to 180 degrees
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