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=-2x-y-2a
b)3m - 2n +1 - m + n -3
=2m-n-2
c)-2a+3b-4+3a-b+1
=a+2b-3
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3x - 2y + a - 5x + y - 3a
a - 3a + 3x - 5x + y - 2y
- 2a - 2x - y
Solución :
- 2a - 2x - y
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3m - 2n + 1 - m + n - 3
3m - m - 2n + n + 1 - 3
2m - n - 2
Solución :
2m - n - 2
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-2a + 3b - 4 + 3a - b + 1
- 2a + 3a + 3b - b - 4 + 1
a + 2b - 3
Solución :
a + 2b - 3