a)x/2 - 7 = x/4 + 5
b) 2x - 1/2 = 5x + 1/3
c) X-1 = 5 - X/4
d) x/6 + x/3 = 18 - X/4
e) X/4 + x/6 + x/6 = 28
f) x/8 + x/5 = 17 - X/10
g) x/4 - X/3 = 2x - 50
h) 5x /2 + 7 = 2x + 4
i) x/4 - X/6 = 3
j) 3x/4 - x/6 = 5
1) x/5 + x/2 = 7/10
m) 2x - 7)/5 = (x + 2)/3
n) 5x/2 = 2x + (x - 2)/3
o) (x - 3)/4 - (2x - 1)/5 = 5
alguém sabe algumas ???helppp
Soluções para a tarefa
Resposta:
a) x/2 - 7 = x/4 + 5
x/2 - x/4 = 5 + 7
2x -x / 4 = 12
x/4 = 12
x = 48
b) 2x- 1/2 = 5x + 1/3
-1/2 - 1/3 = 5x - 2x
3+2/6 = 3x
-5/6 = 3x
x= -5/6 / 3/1
x = -5/18
c) x-1 = 5 - x/4
x + x/4 = 5 + 1
4x+x/4 = 6
5x/4 = 6
5x = 24
x= 24/5 ou 4,8
d) x/6 + x/3 = 18 - x/4
x+2x/6 = 18-x/4
3x/6 + x/4 = 18
6x + 3x/12 = 18
9x/12 = 18
9x = 12.18
9x= 216
x= 24
e)x/4+ x/6 + x/6 = 28
3x+2x/12 + x/6 = 28
5x/12 = 28
5x= 28.11
5x=336
x= 336/5 ou 67,2
f) x/8+x/5 = 17 - x/10
5x+8x/40 = 17 - x/10
13x/40 =17 - x/10
13x/40 + x/10 = 17
13x + 4x /40 = 17
17x/40 = 17
17x = 680
x= 40
g) x/4 - x/3 = 2x - 50
3x - 4x/12 = 2x - 50
-x/12 = 2x - 50
-x/12 -2x = -50
-x-24x/12 = -50
-25x/12 = -50
25x/12 = 50
25x = 600
x= 24
h)5x/2 + 7 = 2x + 4
5x/2 - 2x = 4 - 7
5x-4x/2 = -3
x/2 = -3
x = -6
i) x/4 - x/6 = 3
3x-2x/12 = 3
x/12 = 3
x= 36
j) 3x/4 - x/6 = 5
9x-2x/12 = 5
7x/12=5
7x=60
x=60/7 ou 8,57
k) x/5 + x/2 = 7/10
2x+5x/10 = 7/10
7x/10 = 7/10
7x = 7
x= 1
m) (2x-7)/5 = (x+2)/3
(2x-7) = 5. (x+2)/3
(2x-7) = (5x+10)/3
3.(2x-7) = (5x+10)
6x - 21 = 5x + 10
6x-5x = 10 + 21
x= 31
n) 5x/2 = 2x + (x-2)/3
5x/2 - 2x = (x-2)/3
5x-4x/2 = (x-2)/3
x/2 = (x-2)/3
x= 2. (x-2)/3
x= (2x-4)/3
3x= 2x-4
3x-2x = -4
x= -4
o)(x-3)/4 - (2x-1)/5 = 5
5.(x-3) - 4.(2x-1)/20 = 5
(5x-15 - 8x- 4)/20 = 5
(-3x -19)/20 = 5
-3x-19 = 5.20
-3x-19 = 100
-3x = 100 + 19
-3x = 119
-x = 119 /3
x= -119/3 ou 39,6