Verified answer

1) 2-1=x

x=1

2) 7y -21 +2 -y = 5

6y -19 = 5

6y = 5 + 19

y = 24/6

y = 4

3) 2x -2 +x = 1

3x = 1 +2

x = 3/3

x = 1

4) -14 -7y -y +1 = 6

-13 -8y = 6

-8y = 6 +13

y = -19/8

5) 4x -8 +x -1 = 7

5x -9 = 7

5x = 7 +9

x = 16/5

Obs.: / = divisão (fração)

1)2-1-x=0

1-x=0

-x=-1

x=1

2)7y-21+2-y=5

6x-19=5

6x=5+19

6x=24

x=24/6

x=4

3)2x-2+x=1

3x=3

x=1

4)-14-7y-y+1=6

-8y=6+14

-8y=20

8y=-20

y=-20/8

y=-5/2

5)4x-8+x+1=7

5x-7=7

5x=7+7

5x-14

x=14/5

1. 2-(1+x) = 0 ou 2 -(1+x) + (1+x) = 1 + x ou 2 =1 + x ou 2 - 1 =1 + x - 1 ou x = 1

Simplifique, simplifique !