Question

Ayuda con estas expresiones algebraicas

Answer 1

a) x+3x-3 = 6 - 8x -12
x +3x + 8x = 6 -12 + 3
12x = - 3
x = -3/12 = -1/4

b) 8x - 5 = 6x + 7
8x - 6x = 7 + 5
2x = 12
 x = 12/2 = 2

c) 2x - x -3 = 10 + 7x - 4
2x -x -7x = 10 -4 +3
-6x = 9
 x = 9/-6 = -3/2

d) x + 3(x-1) = 6 - 4(2x+3)
x + 3x -3 = 6 - 8x -12
x + 3x + 8x = 6 - 12 +3
12x = -9
x = -9/12 = -3/4

e) 5x/4 - 1/6 = x + 1/4
(30x - 4)/24 = (4x +1)/4
(30x -4) /6 = (4x +1)
30x -4 = 24x + 6
30x -24x = 6 +4
6x = 10
x = 10/6 = 5/3

f) 3x/8 - x/2 = -3/2
3x/8 - 4x/8 = -12/8
3x - 4x = -12
-x = -12
x = 12

2 a) (x+2)/9 - 3 = (x-8)/3
(x+2)/9 - 27/9 = (3x - 24)/9
x+2 - 27 = 3x -24
x -3x = -24 -2 +27
-x= 1
x = -1

2 b)  (x+3)/6 - 4/3 = (x-2)/4
4(x+3)/24 - 32/24 = 6(x-2)/24
4x +12 -32 = 6x -12
4x - 6x = -12+12+32
-2x = 32
x = 32/-2 = -16

2 c) 9/(3x -2) =1
9 = 3x -2
3x = 11
x = 3/11

2 d) 2/x -4/5 = 3/x
(10-4x)/5x= 15/5x
10 -4x = 15
10 -15 = 4x
4x = -5
x = -5/4

hay te mando la de la primera pagina.
                                            .........Kd