Fisuca

UNIVERSIDAD NACIONAL ABIERTA Y A DISTANCIA












Presentado por:



JORGE ANDRES SANDOVAL SANCHEZ
Cód. 1.069.738064






A la Tutor
RAMIROPEÑA RODRIGUEZ





CEAD Fusagasugá, Colombia
FEBRERO 27 DE 2013











ACTIVIDAD ECUACIONES


1) a. 5x+3x-4=2x+5


5x+3x-2x=5+46x=9
x=9/6 = 3/2


b. 3 (x+5) +2x = -2 (-x+3) + 7


3x+15+2x = 2x -6+7
3x+2x-2x = -15-6+7
3x= -14
x= -14
3c. x-5 + x = 2x-1
4 3


3(x-5) +x (4) = 2x+1
3.4
3x-15 + 4x = 2x +1
12
3x -15+4x=12 (2x+1)
3x-15+4x =24x+12
3x+4x-24x= 15+12
-17x = 27
X= - 27
17

d. (x-3) + 2 (x-1) = x5

x+3 +2x -2 = x
5

3x + 1 = x
5

5(3x+1) = x
15x +5-x =0
15x-x=-5
14x= -5
x= -5
14



e. [x(x-4) + 3 (x-5) ] = x (x+7) + 16

x2 – 4x + 3x -15= x2+7x+16
x2 -4x +3x-15-x2-7x-16 =0-8x -15 -16 =0
-8x-31=0
-8x=31
x= -31
8

f. x+1 + x-1 = 1
2 3 5

5 [(x+1)3 – 2 (x-1)] =12.3

5(3x + 3 – 2x +2) =6
15x+15-10x+10=6
5x = -25 +6
x= 19
5


g. 7x +8 = 2(x+1)

7x+8=2x+2
7x-2x = 2- 8
5x= -6
x= -65

h. {2x -3[x+5(x-2)]}=2x +4
{2x+3[x+5x-10]}=2x+4
2x+3x+9x-30=2x+4
2x+3x+9x-2x=4+30
12x= -6
x= 12/6

i.
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