Question

(3x-2y)+(7x+y).








-(8a+4)-(3a+2)










5a+(3a-2)-(10a-8)










6x+(5x-7)-(20+3x)











(x+y+z+)+x-(3y+z)








(m+2n)-(r-2n)-(n+r)














-(6y+4x)+(3y-4x)-(-2x+3y)










-2n-(n-8)+1









5-(2a-5)+a









3x+(-4-6x)+9










8y-8-(-3y+5)

Answer 1

1) primeiro anexo

2)-8a - 4 -3a - 2
-8a - 3a -4 -2
- 11a = -6
11a = 6
a = 6/11


3)5a+3a-2 -10+8=
8a-4


4)6x+(5x-7)-(20+3x)
6x+5x-3x-7-20
8x-27


5)x+y+z +x +3y +z 
2x +4y + 2z 


6)(m+2n)-(r-2n)-(n+r)
m+2n-r+2n-n-r
m+3n-2r


7)(6y+4x)+(3y-4x)-(-2x+3y)
10x+(3y-4x)-(-2x+3y)
10x+(-1)-(-1x)
10+(+2x)
=12x



8)-2n-(n-8)+1

-3n-9



9)5 -(2a-5)+a
5 - 2a+5+a
-2a+a +5+5

-a +10 reduzido

-a + 10 = 0
-a = -10 (-1)
a = 10  resultado da expressão


10)3x+(-4-6x)+9
12x-18x+9
6x=9
x= 9/6
x= 1,5


11)8Y-8-(-3Y+5)      
8Y-8+3Y-5
8Y+3Y+8-5
11Y-13