2 tarea 30/08/09

1.- 3/7 + 2/5 -(16/8)x=3/7+2/5-(16/8)-3=3/7+2/5=29/35-(16/8)(-3/1)=-48/8-29/35= 1448/280
X= -3
2.- 15-17+33x-9x=15-17=-2+(33)(5)=165-2=163-(9)(5)=163-45=118
X= 5
3.- ((9/5)(5/8))x + (2/3)x +54=(9/5)(5/8)=(45/40)(-4/1)=-180/40+(2/3)(-4/1)=-180/40+-8/3=-220/120+54/1=6260/120
X= -4
4.- (18/7)/((17/5)(8/9))x +19=(17/5)(8/9)=(136/45)(2/1)=272/45/18/7=17294/810
X= 2
5.- (22/16)-17/9+33x-67-6x=22/16-17/9=-74/144+(33)(-2)=-66-67=-133-(6)(-2)=-133-12=
-145/1+-74/144=20954/144
X = -2
6.- 23x-185x+215x-13+44=(23)(7)=161-(185)(7)=1295-161=1134+(215)(7)1505+1134=2639-13=2626+44=2670
X= 7
7.- 42/15 + 33/9 -28x =42/15+33/9=936/135-(28)(8)=224/1=936/135-224/1=29304/135
X= 8
8.- (25/4)(6/9) + 1/2-16x-89+46=(25/4)(6/9)=150/36+1/2=336/72=(16)(-5)=-80-89=-169+46=-123/1-336/72=9192/72
x= -5
9.- ((24/5)/(19/7))x +13x-157x+79=(24/5)(19/7)=(456/45)(7/1)=3192/45+(13)(7)=91(-157)(7)=-1099-91=-1190+79=1111/1+3192/45=-46803/45
X= 7
10.- ((156/37)/(456/89))x +23x-179=(156/37)(456/89)=(71136/3293)(0/1)=0/3293+(23)(0)=0-179=-179/1+0/3293=0/3293
X= 0