Solve the following system by substitution. y = x + 3x + 6 1 x2 y = -x +3 Select the correct choice and fill in any answer boxes in your choice below. O A. The solution(s) is/are (Type an ordered pair. Use a comma to separate answers as needed.) O B. There is no solution.

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