Rewrite 2 + 1/b - 2 = 3b/b + 2 as a proportion. Which of these proportions is equivalent to the original equation?
A.) 3/b-2 = 3b/b+2
B.) 2b+3/b-2 = 3b/b+2
C.) 2b-3/b-2 = 3b/b+2

Solve the original equation by solving the proportion.
The solutions are
-6, -1
-6, 1
-1, 6
1, 6

What is the next step in the given proof? choose the most logical approach. a. statement: m 1 + m 2 + 2(m 3) = 180° reason: angle addition b. statement: m 1 + m 3 = m 2 + m 3 reason: transitive property of equality c. statement: m 1 = m 2 reason: subtraction property of equality d. statement: m 1 + m 2 = m 2 + m 3 reason: substitution property of equality e. statement: 2(m 1) = m 2 + m 3 reason: substitution property of equality