Ecuaciones de primer grado.
Enviado por Regina Ruiz • 27 de Marzo de 2016 • Trabajos • 564 Palabras (3 Páginas) • 169 Visitas
1. [pic 1]3x + 5 -2x + 6x = 4x + 8
3x – 2x + 5 + 6x = 4x + 8
1x + 6x +5 = 4x + 8
7x + 5 = 4x + 8
7x + 5 – 4x = 8
3x = -5 + 8
3x = 3
3x/3 = 3/3
x= 3/3
x=1
2. [pic 2] 3 (x + 5) + 2x = x + 1
5x + 15 + 2x = 7x + 9
5x +15 = 7x + 9
5x + 15 -7x = 9
-2x + 15 = 9
-2x = -15 + 9
-2x = -6
=
x=
x= 3[pic 3][pic 4][pic 5]
3. [pic 6] = x + 1
(5x + 2) =x. (4) + 1. (4)
5x + 2 = 4x + 4
5x +2 -4x = 4
x + 2 = 4
x= -2 + 4
x = 2
[pic 7]
4. = 4 (x – 1) + 3
= 4x -4 + 3
= 4x – 1
. 2[a] = 4x . 2 – 1 .2
3x + 6 = 4 . 2 – 1 . 2
3x +6 = 8x – 2
8x – 3x +6 = -2
-5x +6= -2
-5x = -6 – 2
-5x = -8
x = 8 / 5
[pic 8][pic 9][pic 10][pic 11]
5. + = 2x[pic 12][pic 13]
+ = 2x
+ = 2x
+ = 2x
= 2x
= 2x
2(13x-3) = 2x . (15) [pic 14][pic 15][pic 16][pic 17][pic 18][pic 19][pic 20][pic 21]
2(13x-3) = 30x
26x – 6 = 30x
-4x – 6 = 0
-4x = 6
x = - 3/2
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