Subtract 3 from both sides
simplify 12 - 3 to 9
break down the problem into these two equations
1 + p = 9 and -(1 + p) = 9
solve the first equation 1 + p = 9 and that would be 8 since 1 + 8 = 9 is true.
solve the second equation -(1 + p) = 9 and just simplify brackets and add 1 to both sides then add 9 + 1 and lastly multiply both sides by -1 and p = -10.
Gather both solutions
Answers: p = -10, 8
A. Postulate: If parallel lines are cut by a transversal, then corresponding angles are congruent.
b. Theorem: Vertical angles are congruent.
c. Congruence of angles is transitive.
(or Substitution)
Answer: It is Yes
Step-by-step explanation:
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Step-by-step explanation: