To find the measures of the two adjacent angles that add up to 180°, we can set up the equation based on the information given:
- The first angle is \( (2x + 3)° \).
- The second angle is \( (x - 6)° \).
Since they form a straight line, their sum should equal 180°:
\[ (2x + 3) + (x - 6) = 180 \]
Now, combine like terms:
\[ 2x + 3 + x - 6 = 180 \] \[ 3x - 3 = 180 \]
Next, add 3 to both sides:
\[ 3x = 183 \]
Now, divide by 3:
\[ x = 61 \]
Now we can find the measure of each angle by substituting \( x \) back into the expressions for each angle.
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The first angle: \[ 2x + 3 = 2(61) + 3 = 122 + 3 = 125° \]
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The second angle: \[ x - 6 = 61 - 6 = 55° \]
Thus, the two adjacent angles that form a straight line measure:
\(\boxed{125°}\) and \(\boxed{55°}\).
So the correct response is 125° and 55°.