Question

A;7x-2(3x-4)=-(x-4)+1 B :x-2/3+3x/2+1/6 C:240/X+20=0 D:7/X-3=4/5 alguém pode me ajuda

Answer 1

A;7x-2(3x-4)=-(x-4)+1

7x - 6x + 8 = - x + 4 + 1 ==> 7x - 6x + x =  + 4 + 1 - 8

==> 2x =11 ==> x = 11/2
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B :x-2+6x+1 ==> 6x - 4 + 18x + 1 ==> 24x - 3 
       3   2    6
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C:240+20=0 ==> 240 + 20x = 0 ==> 20x = - 240 ==> x = - 12
      x  
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D:  7-3=4 ==> 35 - 3x = 4x ==> 4x + 3x = 35 ==> 7x = 35 ==> x = 5
     x      5