ecuaciones de primer grado con 1 incognita
Respuestas a la pregunta
Aquí te dejo mi respuesta:
a) x - 5(2x - 3) = 3(x - 1) + 4
x - 10x + 15 = 3(x - 1) + 4
-9x + 15 = 3x + 1
-9x + 15 - 15 = 3x + 1 - 15
-9x - 3x = 3x - 14 - 3x
-12x = -14
x = 7/6 = 1.16666...
b) 2(x - 5)/3 + 4 = 5x - 2
2(x - 5)/3 + 4 - 4 = 5x - 2 - 4
2(x - 5)/3 = 5x - 6
2(x - 5)/3 x 3= 5x x 3 - 6 x 3
2(x - 5) = 15x - 18
2x - 10 = 15x - 18
2x - 10 + 10 = 15x - 18 + 10
2x = 15x - 8
2x - 15x = 15x - 8 - 15x
-13x = -8
x = 8/13 = 0.61538...
c) 3 - x+2/5 = 5(3x - 2)
3 - x+2/5 - 3 = 5(3x - 2) - 3
-x+2/5 = 15x - 13
-x+2/5 x 5 = 15x x 5 - 13 x 5
-(x + 2) = 75x - 65
-x - 2 = 75x - 65
-x - 2 + 2 = 75x - 65 + 2
-x = 75x - 63
-x - 75x = 75x - 63 - 75x
-76x = -63
x = 63/76 = 0.82894...
d) 3(x - 4) + 10 = 13 - x
3x - 2 = 13 - x
3x - 2 + 2 = 13 - x + 2
3x = -x + 15
3x + x = -x + 15 + x
4x = 15
x = 15/4 = 3.75
Espero haberte ayudado :D
Posdata: Me demore porque andaba en clase :')