1) 3(x-15) + 30 - 5x = 3x - 45 + 30 - 5x = -5x + 3x - 45 + 30 = -2x - 15
2) -2(10+y) + 19 + 3y = -20 - 2y + 19 + 3y = -2y + 3y - 20 + 19 = y -1
3) -1.4(a + 6) - 8.1 + 2a = -1.4a - 8.4 - 8.1 + 2a = -1.4a + 2a - 8.4 - 8.1 = 0.6a - 16.5
4) -8/9(-27a - 9) + 25a - 10 = -8/9 -27a - 8/9 -9 + 25a - 10 = 24a + 8 - 25a - 10 = -a - 2
1) 3(x-15) + 30 - 5x = 3x - 45 + 30 - 5x = -5x + 3x - 45 + 30 = -2x - 15
2) -2(10+y) + 19 + 3y = -20 - 2y + 19 + 3y = -2y + 3y - 20 + 19 = y -1
3) -1.4(a + 6) - 8.1 + 2a = -1.4a - 8.4 - 8.1 + 2a = -1.4a + 2a - 8.4 - 8.1 = 0.6a - 16.5
4) -8/9(-27a - 9) + 25a - 10 = -8/9 -27a - 8/9 -9 + 25a - 10 = 24a + 8 - 25a - 10 = -a - 2