Приведи подобные слагаемые. 1) 3a +14+5a-a+7 2) 13 + 7x + 5-7+x 3) 24 + y + 2y - 12 + 4y 4) a + 2y + x + 3a + 6x + 4y 5) -x+5-4x-9 6) y-2x-5y + 4x 7) -4,3 + 2x - 5,2-3,5x 8) -2+3+7b-14 9) 3x+2y-4+ y 10)9,5x + 2,9-6,7-4,8x

Ответ:

1. 3a + 14 + 5a - a + 7 = (3a + 5a - a) + (14 + 7) = (3 + 5 - 1)a + 21 = 7a + 21
2. 13 + 7x + 5 - 7 + x = (7x + x) + (13 + 5 - 7) = (7 + 1)x + 11 = 8x + 11
3. 24 + y + 2y - 12 + 4y = (y + 2y + 4y) + (24 - 12) = (1 + 2 + 4)y + 12 = 7y + 12
4. a + 2y + x + 3a + 6x + 4y = (a + 3a) + (2y + 4y) + (x + 6x) = (1 + 3)a + (2 + 4)y + (1 + 6)x = 4a + 6y + 7x
5. -x + 5 - 4x - 9 = (-x - 4x) + (5 - 9) = (-1 - 4)x - 4 = -5x - 4
6. y - 2x - 5y + 4x = (y - 5y) + (-2x + 4x) = (1 - 5)y + (-2 + 4)x = -4y + 2x
7. -4,3 + 2x - 5,2 - 3,5x = (2x - 3,5x) + (-4,3 - 5,2) = (2 - 3,5)x - 9,5 = -1,5x - 9,5
8. -2 + 3 + 7b - 14 = 7b + (-2 + 3 - 14) = 7b + (1 - 14) = 7b - 13
9. 3x + 2y - 4 + y = 3x + (2y + y) - 4 = 3x + (2 + 1)y - 4 = 3x + 3y - 4
10. 9,5x + 2,9 - 6,7 - 4,8x = (9,5x - 4,8x) + (2,9 - 6,7) = (9,5 - 4,8)x - 3,8 = 4,7x - 3,8

Ответ: