Since angles 1 and 4 are vertical angles, they are congruent. Therefore, we can set up an equation:
m∠1 = m∠4
125° = x + 35°
To solve for x, we subtract 35 from both sides of the equation:
125° - 35° = x
90° = x
m∠1=125° and m∠4=(x+35)°
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