Question

resuelve las ecuaciones:

3x-4x-8/2=3(1+x+5/4)+1

5x+4/9-x+4/3=7+3x/10+2-4x/2

Answer 1

3x - 4x - 8/2 = 3(1+x+5/4)+1
-x - 8/2 = 3(1+(4x+5)/4)+1
(-2x -8)/2 = 3[(4+4x+5)/4] + 1
(-2x -8)/2 = [(12 + 12x + 15)/4] + 1
(-2x -8)/2 = (12 + 12x + 15 +4)/4.. (Simplificamos los denominadores...) 
2 * (-2x - 8) = 31 + 9x
-4x - 16 = 31 + 9x
-13x = 47
x= - 47/13

5x + 4/9 -x + 4/3 = 7 + 3x/10 + 2 -4x/2
(45x + 4)/9 - (3x + 4)/3 = (70 + 3x)/10 + (4 - 4x)/2 ... Luego sacamos minimo comun multiplo
(4x + 4 - 9x - 12)/9 = (70 + 3x + 20 - 20x)/10  ... Multiplicamos en Cruz 
360x - 80 = 450 - 153x
513x = 1250 
    x=1250/513