b. 29
Step-by-step explanation:
being correspondingangle
B
For the lines to be parallel.
The 2 given angles are corresponding and congruent, that is
4x - 12 = 3x + 17 ( subtract 3x from both sides )
x - 12 = 17 ( add 12 to both sides )
x = 29 → B
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15 units use socratic
step-by-step explanation: 15 units