Respostas
respondido por:
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a) 2x+5y+1+3y-7x-8+12x-y
7x-7y-7
b)2x+5y+1-(3y-7x-8)-(12x-y)
2x+5y+1-3y+7x+8+12x+y
21x+3y+9
c)3y-7x-8-(2x+5y+1)+12x-y
3y-7x-8-2x-5y-1+12x-y
3x-3y-9
d)12x-y-(2x+5y+1)-(3y-7x-8)
12x-y-2x-5y-1-3y+7x+8
17x-8y+7
7x-7y-7
b)2x+5y+1-(3y-7x-8)-(12x-y)
2x+5y+1-3y+7x+8+12x+y
21x+3y+9
c)3y-7x-8-(2x+5y+1)+12x-y
3y-7x-8-2x-5y-1+12x-y
3x-3y-9
d)12x-y-(2x+5y+1)-(3y-7x-8)
12x-y-2x-5y-1-3y+7x+8
17x-8y+7
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