Question

Resolva as equações:
4x + 15 = 0
5x - 20 = 0
4x + 13 = 7x - 5
7x + 32 - 3x = 2x + 46
4x/3 - 9 + 2x/9 = 3
x/4 - 3x - 14 /12 = 7- x/ 9
5x/7 + x-8/3 = 16/21

Answer 1

Resposta: olá, tudo bem??

Explicação passo-a-passo:

4x + 15 = 0=> 4x = -15 => x = -15/4

5x - 20 = 0 => 5x = 20 => x = 20/5 => x = 4

4x + 13 = 7x - 5 => 4x -7x = -5 - 13 => -3x = -18 (-1) => x = 18/3 => x = 6

7x + 32 -3x = 2x + 46=> 7x - 3x -2x = 46 - 32 => 7x - 5x = 14=> 2x = 14 => x = 7

4x/3 - 9 + 2x/9 = 3 => 4x/9 + 2x/9 = 3 + 9 => 6x/9 = 12 => 6x = 12.9 => 6x = 108 => x =108/6 => x = 18

x/4 -3x -14/12 = 7 - x/9 => x/4 + x/9 -3x = 7 + 14/12 =>x/4 + x/9 -3x = 7 + 7/6 =>

54x/216  + 24x /216  -  648x/216 =   1512/216 +   252/216 =>

-570x/216 = 1764/216 => -570X= 1764(-1) => 570x =-1764 => x = -1764/570 => x = - 882/ 285

Bons estudos!