1) a+4a + 4a+4 + a−13a - 13a−13 = a + 4 + a - 13 = 2a - 9
2) −c−12-c - 12−c−12 + −c+5-c + 5−c+5 = -c - 12 - c + 5 = -2c - 7
3) −8+n−m-8 + n - m−8+n−m + −t−n+m-t - n + m−t−n+m = -8 + n - m - t - n + m = -t - 8
4) 3.6−w−x3.6 - w - x3.6−w−x + y−w+1.2y - w + 1.2y−w+1.2 = 3.6 - w - x + y - w + 1.2 = 4.8 - x + y
1) a+4a + 4a+4 + a−13a - 13a−13 = a + 4 + a - 13 = 2a - 9
2) −c−12-c - 12−c−12 + −c+5-c + 5−c+5 = -c - 12 - c + 5 = -2c - 7
3) −8+n−m-8 + n - m−8+n−m + −t−n+m-t - n + m−t−n+m = -8 + n - m - t - n + m = -t - 8
4) 3.6−w−x3.6 - w - x3.6−w−x + y−w+1.2y - w + 1.2y−w+1.2 = 3.6 - w - x + y - w + 1.2 = 4.8 - x + y