13t + 7 – 6t + 8 + 5t – 9 + 4t = 6t – 2 + 2t – 8
13t – 6t + 5t + 4t – 6t – 2t = – 8 – 2 + 9 – 8 – 7
8t = -16
t = -2
13t + 7 – 6t + 8 + 5t – 9 + 4t = 6t – 2 + 2t – 8
13t – 6t + 5t + 4t – 6t – 2t = – 8 – 2 + 9 – 8 – 7
8t = -16
t = -2