a) 15/52
b) -25/20
c) -5
d) +5
2007-03-04 02:31:33 · 15 respostas · perguntado por Anonymous em Ciências e Matemática ➔ Matemática
2x+3x+23=25x-2
5x - 25x = -2 - 23
-20x = -25
x = -25/-20
x = 25/20 ou 5/4 ou 1,25
Resposta: Nenhuma das alternativas propostas.
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2007-03-04 04:01:48 · answer #1 · answered by aeiou 7 · 0⤊ 2⤋
2x +3x +23 = 25x - 2 resolvendo:
5x +23 = 25x-2
23+2=25x-5x
25=20x equivale 20x=25
x=25/20 simplificando por 5
x=5/4
NDA
2007-03-04 02:51:17 · answer #2 · answered by SUBHELEN 3 · 3⤊ 1⤋
A resposta correta é 25/20 comprovada através da prova real.
2007-03-07 02:20:20 · answer #3 · answered by Jade 3 · 0⤊ 0⤋
resposta e 5/4
2007-03-06 23:15:58 · answer #4 · answered by Miguel Kiwakana K 3 · 0⤊ 0⤋
2x + 3x + 23 = 25x-2
resolvendo:
2x + 3x -25x = -2 -23
-20x = -25
x = - 25/-20
portanto usando a regra de sinais. - - = +
temos: x= 25/20 ou 5/4
Nenhuma das respostas.
2007-03-06 07:07:03 · answer #5 · answered by jsc 1 · 0⤊ 0⤋
A preguiça chegou ai e parou! Vá fazer seu dever de casa voce mesmo!
2007-03-04 02:35:37 · answer #6 · answered by M.M.D.C. 7 · 1⤊ 1⤋
2x+3x+23 = 25x-2
5x+23 = 25x-2
20x = 25
x = 5/4 ... ou ... x = 25/20
2007-03-04 02:52:22 · answer #7 · answered by Luiz S 7 · 1⤊ 2⤋
LETRA B
2x+3x-25x=-2-23
5x - 25x= -25
-20x=-25
x= -25/20
2007-03-04 04:25:48 · answer #8 · answered by _bruno_ 3 · 0⤊ 2⤋
2x+3x+23=35x-2
Iguala tudo a zero..
2x + 3x + 23 = 25x - 2
2x + 3x + 23 - 25x +2 = 0
5x + 25 - 25x = 0
+ 25 - 20x = 0
- 20x = - 25
x = -25/-20
x = 1,25...
Pronto!!!!!!!!
2007-03-04 04:10:44 · answer #9 · answered by ? 6 · 0⤊ 2⤋
na verdade achei 25/20 pois:
2x+3x+23=25x-2
5x+23=25x-2
5x-25x=-2-23
-20x=-25 em caso de x negativo deve-se multiplicar tudo por (-1)
20x=25
x=25/20 ou ainda
x=5/4
2007-03-04 03:03:15 · answer #10 · answered by rjor_vip 1 · 0⤊ 2⤋