Q1: Plot a graph for a linear equation x + 2}! = 7 and y = 3x + 1. Q2: Solve a system using the substitution method I + y : 24 , x + 2x = 24. Q3: Solve a system using the elimination method 9y + 4x 20 = 0, 7y + 16x 80 = 0. Q4: Solve a system using graphical method 3; + x : 3, y = 4x 2. (15: Suppose mattrix A, B; C, and prove the associative property of addition [A+B)+C=A+{B+C}. 5:05 am