Question

Resolva as seguintes equações no caderno. 1) 4x – 1 = 7 2) 3x – 9 = 12 3) 3x + 2 = 4x + 9 4) 5x – 2 + 12 = 6x + 4 5) 2x – 6 = 16 6) 3x – 4 + 2 = 2x – 4 + 12 7) 4x – 7 = 2x – 8 8) 6x – 3 = 12 – 9x 9) x + 4 – 3x = 4 - 12x 10) 6x – 4 + 12 = 3 + 4x – 9 11) –5 = 3x + 4 – 12 - 9x 12) 3x + 5 - 2 = 2x + 12 13) 3(x + 2) = 15 14) –2 (-x + 2) = 3 (2x + 2) 15) 12x + 3 (x – 1) = -2(x -1) + 12 16) 2 (x - 1) = 0 17) 3 (x +2) = 15 18) 2 (x + 2) = 12 19) x = -3 (x – 4) 20) 2 (x + 5) = -3 (x – 5) 21) –2 (x + 4) = -21 + 9 (x – 1) 22) 5 (x – 4) = 1 + 9 (x – 1) 23) –5 (x – 4) + 4 = 2 (-2 x – 2) + 9 24) -2 (x – 5) + 3x = - (x + 2) – 2 25) - (x + 5) – 6 = -9 (x – 3) – 6 26) x - 7 + 2 (x – 4) = -3 (x + 2) – 8 27) 28) 29) 30) x 3 − 1 2 = − x 3

Answer 1

1)4x-1=7

4x=7+1

x=8/4

x=2

2)3x-9=12

3x=12+9

x=21/3

x=7

5)2x-6=16

2x=16+6

x=22/2

x=11

7)4x-7=2x-8

4x-2x=-8+7

2x=-1

x=-1/2

8)6x-3=12-9x

6x+9x=12+3

15x=15

x=1

9)x+4-3x=4-12x

x-3x+12x=4-4

10x=0

x=0

10)6x-4+12=3+4x-9

6x-4x=-4+12-3+9

2x=14

x=14/2

x=7

13)3(x+2)=15

3x+6=15

3x=15-6

x=9/3

x=3

15)12x+3(x-1)=-2(x-1)+12

12x+3x-3=-2x+2+12

12x+3x+2x=2+12+3

17x=17

x=17/17

x=1

16)2(x-1)=0

2x-2=0

2x=0-2

x=-2/2

x=1

17)3(x+2)=15

3x+6=15

3x=15-6

x=9/3

x=3

18)2(x+2)=12

2x+4=12

2x=12-4

x=8/2

x=4

22)5(x-4)=1+9(x-1)

5x-20=1+9x-9

5x-9x=1-9+20

-4x=28

x=28/-4

x=-7

Explicação passo-a-passo:

(3,4,6,11,12,14,19,20,21,23,24,25,26,30 nao sei )

espero ter ajudado e desculpa nao saber o resto