Very confused & don't understand, if anyone can explain i appreciate it!
7x - (3x + 5) - 8 = 1/2(8x + 20) - 7x + 5

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

Collin did the work to see if 10 is a solution to the equation r/4=2.4

Awindow washer cleans 42 windows in 2 hours. at this rate, how many windows did he clean in 180 minutes.