Question

I) -9x+7x-5x+2x 2) 5a-6a+2a-10a 3) -3,8k-k+3,8k+k 4) а + 6,2a-6,5a-а 5)2/9m+4/9m-3/9m-5/9m 6) -18n-12n+ 7,3n +6,5n 7) -8x+5,2a+3x+50a 8) 5a-9,2m+7a+ 15m 9)2/7x-4/9y-5/14x+2/3y l0) -6a+5a -x+4x ll) 23x-23+40+4x l2) 4x-2a+6x-3a+4 l3) -6.3m+8-3,2m-5 i4) 4a-6a-2a+12-ll 15)0.2m-2/9-4m+5/9 19) 7,4x 5,3y +6,6x-3.7y

Answer 1

1) -9x+7x-5x+2x = -5x
2) 5a-6a+2a-10a = -9a
3) -3,8k-k+3,8k+k = 0
4) а + 6,2a-6,5a-а = -0,3k
5)2/9m+4/9m-3/9m-5/9m = -2/9 m
6) -18n-12n+ 7,3n +6,5n = -16,2n
7) -8x+5,2a+3x+50a = -5x + 55,2a
8) 5a-9,2m+7a+ 15m = 12a + 5,8m
9)2/7x-4/9y-5/14x+2/3y = 2/9y - 1/14x
l0) -6a+5a -x+4x = 3x - a
ll) 23x-23+40+4x = 27x + 17
l2) 4x-2a+6x-3a+4  = 10x - 5a + 4
l3) -6.3m+8-3,2m-5 = 3 - 9,5m
i4) 4a-6a-2a+12-ll = 1 - 4a
15)0.2m-2/9-4m+5/9 = 1/3 - 3,8m
19) 7,4x 5,3y +6,6x-3.7y = НЕПОНЯТНО, КАКОЙ ЗНАК МЕЖДУ ПЕРВЫМИ ДВУМЯ ЧИСЛАМИ 

Answer 2

Let's simplify each expression:

1. -9x + 7x - 5x + 2x Simplifying the x terms, we have: -9x + 7x - 5x + 2x = -5x

2. 5a - 6a + 2a - 10a Simplifying the a terms, we have: 5a - 6a + 2a - 10a = a - 10a - 6a + 2a = -13a

3. -3.8k - k + 3.8k + k Simplifying the k terms, we have: -3.8k - k + 3.8k + k = -k + k + 3.8k - 3.8k = 0

4. а + 6.2a - 6.5a - а Simplifying the a terms, we have: а + 6.2a - 6.5a - а = (а - а) + 6.2a - 6.5a = -0.3a

5. 2/9m + 4/9m - 3/9m - 5/9m Simplifying the m terms, we have: 2/9m + 4/9m - 3/9m - 5/9m = (2/9 + 4/9 - 3/9 - 5/9)m = -2/9m

6. -18n - 12n + 7.3n + 6.5n Simplifying the n terms, we have: -18n - 12n + 7.3n + 6.5n = (-18 - 12 + 7.3 + 6.5)n = -16.2n

7. -8x + 5.2a + 3x + 50a Simplifying the x and a terms separately, we have: -8x + 5.2a + 3x + 50a = (-8x + 3x) + (5.2a + 50a) = -5x + 55.2a

8. 5a - 9.2m + 7a + 15m Simplifying the a and m terms separately, we have: 5a - 9.2m + 7a + 15m = (5a + 7a) + (-9.2m + 15m) = 12a + 5.8m

9. 2/7x - 4/9y - 5/14x + 2/3y Simplifying the x and y terms separately, we have: 2/7x - 4/9y - 5/14x + 2/3y = (2/7 - 5/14)x + (-4/9 + 2/3)y = (4/14 - 5/14)x + (-4/9 + 6/9)y = (-1/14)x + (2/9)y

10. -6a + 5a - x + 4x Simplifying the a and x terms separately, we have: -6a + 5a - x + 4x = (-6a + 5a) + (-x + 4x) = -a +