segunda tarea de algebra (ROBERTO) 29 de agosto 2009 1-6 T.M.

1.-3/7 + 2/5 - (16/8) x=181/35
(3/7)+(2/5)=15+14/35=29/34

(16/8)(-3/1)=-48.5

(29/35)-(48/8)=232-1680/280=1448/280=181/35

2.-15-17+33x-9x=118
15-17+33(5)-9(5)=

15-17+165-45=180-62=118

3.-((9/5)(5/8))x-(2/3)x+54=52.16
(45/40)(-4)-(2/3)(-4)+54=

(-180/40)-(-8/3)+54=

-540+320/120=(-220/120)+(54/1)=-220+6480/120=6260/120=313/6=52.16

4.-(18/7)/((17/5)(8/9))x+19=43.7/315
(18/7)/(136/45)(2)+19

(18/7)/(272/45)+19=810/1904/315=(2.3/315)+(19/1)=43.7/315

5.-(22/16)-(17/9)+33x-67-6x=590/57
(198-272/144)=74/144+33(-2)-67-6(-2)=

(74/114)-(66/1)-67+12=

(74-7524/114)-67+12=

(7450/114)-(55/1)=7450-6270/114=1180/114=590/57

6.-23x-185x+215x-13+44=402
23(7)-185(7)+215(7)-13+44=161-1295+1505-13+44

1710-1308=402

7.-42/15+33/9-28x=29367/135
(42/15)+(33/9)-28(8)

378+495/135-224=(873/135)-(224/1)=873-30240/135=29367/135=

8.-(25/4)(6/9)+1/2-16x-89+46=6053
(150/36)+(1/2)-16(-5)-89+46

300+36/72=(336/72)-(-80/1)-89+46=

336+5760/72=6096-89+46=6142-89=6053

9.-((24/5)/(19/7))x+13x-157x+79=915.23
(168/95/35)=(1.7/35)(7)+13(7)-157(7)+79=

(1.7/35)(7/1)=(11.9/35)+(91/1)=11.9+3185/35=

(3196.9/35)-(1099/1)=3196.9-38465/35=29268.1/35

(29268.1/35)+(79/1)=29268.1+2765/35=32033.1/35=915.23

10.-((156/37)/(456/89))x+23x-179=155.99
13884/16872/3293=.822/3293

(.822/3293)+(23/1)=.822+75739/3293=

(75739.822/3293)-(179/1)=75739.822-589447/3293=

513707.18/3293