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1Luannaa2
@1Luannaa2
January 2020
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Calcule o valor de x em:
a)2+x 3
-------- = ------
x-5 4
b) x-1 3
------ = ------
x-2 2
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→ Vamos multiplicar cruzado em ambos os casos.
a) 4(2+x) = 3 ( x-5)
8 + 4x = 3x -15
4x -3x = -15-8
x = -23 ← Resposta.
b) 2(x-1) = 3(x-2)
2x - 2 = 3x - 6
2x - 3x = -6+2
-x = -4
x = 4 ← Resposta
att: Jhonny
0 votes
Thanks 1
keyla327
Olá!
Em ambas você realizará a multiplicação cruzada.
a) 8+4x=3x-15
4x-3x= -15-8
x= -23
b) 2x-2=3x-6
2x-3x=-6+2
-1x= -4
x= -4/-1
x= 4
Abraço.
1 votes
Thanks 0
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Lista de comentários
a) 4(2+x) = 3 ( x-5)
8 + 4x = 3x -15
4x -3x = -15-8
x = -23 ← Resposta.
b) 2(x-1) = 3(x-2)
2x - 2 = 3x - 6
2x - 3x = -6+2
-x = -4
x = 4 ← Resposta
att: Jhonny
Em ambas você realizará a multiplicação cruzada.
a) 8+4x=3x-15
4x-3x= -15-8
x= -23
b) 2x-2=3x-6
2x-3x=-6+2
-1x= -4
x= -4/-1
x= 4
Abraço.