Question

me ajudemmm obrigada

Answer 1

= a + 5b - 3a + 2a - b
= a + 2a - 3a + 5b - b
= 3a - 3a + 4b
= 4b
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b)
= 2x - 8x + x - 5x - 4x + 7x
= - 6x - 4x + 3x
= - 10x + 3x
= - 7x
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c)
= 8x - 5y + 2z - 6x - y + 10z
= 8x - 6x - 5y - y + 2z + 10z
= 2x - 6y + 12z
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d)
= 3,2m - 0,5n + 4m + 2,5n
= 3,2m + 4m - 0,5n + 2,5n
= 7,2m + 2n
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e)

= 9m + m - 10m
= 10m - 10m
= 0
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f)

- 3a  - 2x + 5a  + 7x
   4              2      6

- 3a + 5a  - 2x + 7x
   4      2             6

- 3a + 10a   - 12x + 7x
     4                  6

= 7a - 5x
    4     6

Answer 2

a) a+5b-3a+2a-b=
-2a+2a+4b=
4b

b) 2x-8x+x-5x-4x+7x
-6x+x-5x-4x+7x
-5x-5x-4x+7x
-10x-4x+7x
-14x+7x
-7x

c) 8x-5y+2z-6x-y+10z
2x-6y+12z

d) 3,2m-0,5n+4m+2,5n
7,2m+2n

e) 9m+m-10m = 0

f) 3a/4 - 2x + 5a/2 + 7x/6
mmc entre 6, 4 e 2 =12

9a-24x+30a+14x
39a-10x