Question

14)-2- (-m + 2) = 3 (2m + 1)
15) 12m + 3 (m − 1) = -2(m +1) + 12
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16) 2 (x-1)=0
17)-3 (m +2) = 1
18) 2 (x+2) = 12
19) m = -3 (m-4)
20) 2 (m+5) = -3 (m-5)
21)-2 (y + 4) = -7+9 (y-1)
22) 5 (x-4)=-4+9 (x-1)
23)-5 (x-4) + 4 = 2 (-2x-2) +9

Answer 1

Explicação passo-a-passo:

14)

-2- (-m + 2) = 3 (2m + 1)

-2+m-2=6m+3

-4+m= 6m+3

-4-3= 6m-m

-7= 5m

5m= -7

m= -7/5

15) 12m + 3 (m − 1) = -2(m +1) + 12

12m+3m-3= -2m -2 + 12

15m-3= -2m+10

15m+2m= 10+3

17m= 13

m= 13/17

16) 2.(x-1)=0

2x-2=0

2x=2

x=2/2

x=1

17)-3 (m +2) = 1

-3m-6= 1

-3m=1+6

-3m=7

m= -7/3

18) 2 (x+2) = 12

2x+4=12

2x=12-4

2x=8

x=8/2

x=4

19) m = -3 (m-4)

m = -3m +12

m+3m = 12

4m=12

m= 12/4

m= 3

20) 2 (m+5) = -3 (m-5)

2m+10= -3m+15

2m+3m= 15-10

5m=5

m=5/5

m= 1

21)

-2 (y + 4) = -7+9 (y-1)

-2y-8= -7+9y-9

-2y-9y= -16+8

-12y= -8

y= 8/12 (:4)/(:4)

y= 2/3

22)

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

5x-20= -4+9x-9

5x-20= -13+9x

5x-9x= -13+20

-4x= 7

x= -7/4

23)

-5 (x-4) + 4 = 2 (-2x-2) +9

-5x+20 +4 = -4x-4+9

-5x+24= -4x+5

4x-5x= 5-24

-x= -19

x= 19