martes, 22 de septiembre de 2009

cuarta tarea algebra

1.-(5/3)+(4/3)=2x
9/3=2x
3=2x
3/2=x
1.5=X

2.- (6/7)(3/9)+3x=4-(17/5)
18/63+3x=4-(17/5)
0.2+3x=4-3.4
3x=4-3.4-0.2
3x=0.4
x=0.4/3
x=0.13

3.- (23/3)+(16/9)x=23x-12
7.6+1.7x=23x-12
7.6+24.7x=-12
24.7x=-12-7.6
24.7x=-19.6
x=-19.6/24.7
x=-0.7

4.- 12x-18+(23/7)=(145/2)-4x
12x-18+3.2=72.5-4x
16x-18+3.2=72.5
16x=72.5+18-3.2
16x=87.3
x=87.3/16
x=5.45625

5.- ((14/2)(15/9)/(125/25))=17/3+(13/4)x
(210/18)/(125/25)=17/3+3.25x
5250/2250=17/3+3.25x
2.3=5.6+3.25x
2.3-5.6=3.25x
-3.3=3.25x
-3.3/3.25=x
-1.0=x

6.- 22-178+33/5-16x=147+(248/16)x
22-178+6.6-16x=147+15.5x
22-178+6.6-147=15.5x+16
-156+6.6-147 =31.5x
-149.4-147=31.5x
296.4=31.5x
296.4/31.5=x
9.40=x

7.- (2)(-3)(5)+25x =(147/15)x-248/43-223/105
-30+25x=(147/15)x-248/42-223/105
-30+25x=9.8x-5.9-2.1
-30+15.2x=-5.9-2.1
15.2x=-5.9-2.1+30
15.2x=22
x=22/15.2
x=1.44737

8.- (45/7)/(198/26)+28x=13+(14/67)(222/111)1170/1386+28x=13+3108/1437
0.8+28x=13+2.1
28x=13+2.1-0.8
28x=14.3
x=14.3/28
x=0.5

9.- 48/5+(2/3)x=1657+345
9.6+0.6x=1657+345
0.6x=1657+345-9.6
0.6x=1992.4
x=1992.4/0.6
x=332.06667

10.- (2)(-5)(-7)(-8)(9)+257896-1247-5x=951753+456
-5040+257896-1247-5x=951753+456
5x=951753+456+5040-257896+1247
5x=700600
x=700600/5
x=140120

No hay comentarios:

Publicar un comentario