segunda tarea del 1°5 T.MAT. ALGEBRA 28/08/09

1.-((3/5)/(16/9)x+12x-36=
con x=-2

((3/5)/(-32/9)-24-36
-27/160-24-36
-27-3840/160
-3867/160-36/1
-3867-5760/160
=-9627/160

con x=2
((3/5)/(32/9)+24-36
27/160+24-36
27+3840/160
3867/160-36/1
3867-5760/160
=1893/160

2.-13x-35+2/7-15/8
con x=-3

-39-35+2/7-15/8
-74+2/7-15/8
(-518+2)/7-15/8
-516/7-15/8
(-4128-105)/56
=4233/56

con x=3
39-35+2/7-15/8
4+2/7-15/8
(28+2)/7-15/8
30/7-15/8
(240-105)/56
=135/56

3.-21x-16x-18+23-65+79-45x
con x=-4

-84+64-18+23-65+79+180
-20-18+23-65+79+180
-38+23-65+79+180
-15-65+79+180
-80+79+180
-1+180
=+179

con x=5

105-80-18+23-65+79-225
25-18+23-65+79-225
7+23-65+79-225
30-65+79-225
-35+79-225
+44-225
=-171

4.-((9/8)(7/14)/(23/6))x+(1/5)x-19
con x=-6

((63/112)/(23/6))x+(-6/5)-19
(378/2576)x-6/5-19
2268/2576-6/5-19
(11340-15456)/12880-19
-4116/12880-19
(-4116-244720)/12880
=-248836/12880

con x=3
((63/112)/(23/6))x+(3/5)-19
(378/2576)x+3/5-19
1134/2576+3/5-19
(5670+7728)/12280-19
13398/12280-19
(13398-233320)/12280
=-219922/12280

5.-(23/4)(65/6)+(2/3)x-16/5)x+22
con x=5

1495/24+10/3-80/5+22
(4485+240)/72-80/5+22
4725/72-80/5+22
(23625-5760)/360+22
17865/360+22
17865+7920/360
=25785/360

con x=-7

1495/24-14/3-112/5+22
(4485-336)/72-112/5+22
4149/72-112/5+22
(20745-8064)/360+22
12681/360+22
12681+7920/360
=20601/360