Two lines that have the same slope and y-intercept

Can someone pls ! pls answer all. no explanation needed..

Solve the equation. 2x - 8(x+1)= 6(2x - 3)

Aprobability experiment is conducted in which the sample space of the experiment is s={7,8,9,10,11,12,13,14,15,16,17,18 }, event f={7,8,9,10,11,12}, and event g={11,12,13,14}. assume that each outcome is equally likely. list the outcomes in f or g. find p(f or g) by counting the number of outcomes in f or g. determine p(f or g) using the general addition rule.