2(x-6)+3=19
2x-12+3=19
2x=19-3+12
2x=28
x=28/2
x=14
agora por favor mne de 10 pontos
2007-02-07 09:14:27
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answer #1
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answered by Anonymous
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Tendo 2(x-6)+3=19.
Eliminando o parêntese teremos: 2x-12+3=19.
Logo: 2x=l9+12-3. ( note que trocamos os sinais ao mudar de
lado).
Efetuando: 2x=31-3 donde 2x=28.
Logo: x=28/2 ou seja x=14.
Se substituirmos na equação dada x pelo valor encontrado
verificaremos que realmente o valor de x é 14.
2x14=28 ou seja: 28=28 uma igualdae.
2007-02-10 04:36:56
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answer #2
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answered by Mascarado de Ita 2
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2x-12+3=19
2x=19+12-3
2x=19+9
2x=28
x=28/2
x=14
S={14}
2007-02-08 07:13:16
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answer #3
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answered by joao s 1
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2(x-6)+3=19
2x - 12 + 3 = 19
2x - 9 = 19
2x = 19 + 9
2x = 28
x = 28 : 2
x = 14
Solução: {x pertence a R| x = 14}
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2007-02-07 21:23:12
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answer #4
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answered by aeiou 7
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2x + 12 + 3 = 19
2x+ 15 = 19
x = 2
2007-02-07 19:12:53
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answer #5
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answered by data show 2
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2(x-6) + 3 = 19
2x - 12 + 3 = 19
2x - 9 = 19
2x = 28
x = 28/2
x = 14
2007-02-07 18:32:48
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answer #6
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answered by Anonymous
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2(x-6) + 3 = 19
2x - 12 + 3 = 19
2x = 19 +12 -3
2x = 28
x = 14
2007-02-07 18:32:20
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answer #7
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answered by Luiz S 7
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Agora não vale. Já fizeram...não vou nem tentar...
2007-02-07 17:59:37
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answer #8
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answered by Marinalva C 1
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Faça a lição de casa e passe de ano...
2007-02-07 17:23:48
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answer #9
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answered by Anonymous
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2x - 12 + 3 = 19
2x = 19 + 9
2x = 28
x = 14
2007-02-07 17:10:50
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answer #10
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answered by MariaCrissssss 7
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