Respostas

2014-04-29T13:56:18-03:00
a) 3x+10=37   => 3x=37-10 => 3x=27 => x=27/3  => x=9

b) 5               1       
  ___     =    ____
x+1             4    

5*4=1*x+1 => 20=x+1 => x=19

c) 4x+6x=2x+32   => 8x=32 => x=32/8 => x=4

e) 2(x + 4) = 3 (x - 1)   => 2x+8=3x-3 => 11=3x-2x => x=11
 
f)  4         x 
 ___ = ___   
 x          4    

=> 16=x^2 => x=4

g) x² = 9
  => x=3

h) 3x² =9   => x=3/3 => x=1

i) x - 1 = 0   => x=1

j) 100 x = 1000
=> x=1000/100 => x=10

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