Answer:x+12
Step-by-step explanation:
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Answer:
x + 80°= 180° ( angles made in straight line)
x = 180°-80°
x = 100°
hope it is helpful to you
Line a can be rewritten as
.. 2y -x = 12
The coefficients of y and x match those of line b, so lines "a" and "b" are parallel.
