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Respondido

determine o valor de x :

a)7x +4 = -2x +104

b)8x -5 = -2x +145​

Resposta :

Yaoisegundasextago

Resposta:

a) 7x + 4 = -2x + 104

   7x + 2x = 104 - 4

   9x = 100

     x = 100/9

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b) 8x - 5 = -2x + 145

   8x + 2x = 145 + 5

   10x = 150

      x = 150/10

      x = 15 ​

 

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