me ajudem 6)3(x+2)=15. 7)-2(-m+2)=3(2m+1). 8)12m+3(m-1)=-2(m+1)+16. 9)-2(y+4)=10+9(y-1). 10)5(x-4)=-3+9(x-1). 11)-5(k-4)+4=2(-2k-2). espero que vcs me ajudem
Respostas
Resposta:
6) 3 (x + 2) = 15
3x + 6 = 15
3x = 15 - 6
3x = 9
x = 9/3
x = 3
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7) -2 (-m + 2) = 3 (2m + 1)
2m - 4 = 6m + 3
2m - 6m = 3 + 4
-4m = 7 . (-1)
4m = -7
m = -7/4
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8) 12m + 3 (m - 1) = -2 (m + 1) + 16
12m + 3m - 3 = -2m - 2 + 16
12m + 3m + 2m = -2 + 16 + 3
17m = 17
m = 17/17
m = 1
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9) -2 (y + 4) = 10 + 9 (y - 1)
-2y - 8 = 10 + 9y - 9
-2y - 9y = 10 - 9 + 8
-11y = 9 . (-1)
11y = -9
y = -9/11
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10) 5 (x - 4) = -3 + 9 (x - 1)
5x - 20 = -3 + 9x - 9
5x - 9x = -3 - 9 + 20
-4x = 8 . (-1)
4x = -8
x = -8/4
x = -2
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11) -5 (k - 4) + 4 = 2 (-2k - 2)
-5k + 20 + 4 = -4k + 4
-5k + 4k = 4 - 20 -4
-k = -20 . (-1)
k = 20