Question

Olá, estou quase chegando em casa, estava viajando e tenho que mandar um e-mail pra professora da tarefa e só chego em casa 19:00
a) x/3 + x/2 = 15
b) x/2 + x/4 = 2
c) 0 = x + 12
d) y/4 = 3
e) x/5 = 2
f) 6x -4 = 2x + 8
g) 17x - 2 + 4 = 10 + 5x
h) 4x - 10 = 2x + 2
i) 5x + 6x - 16 = 3x + 2x - 4
j) 5 (2x - 4) = 7 (x + 1) -3
k) 4 (x + 3) = 1
l) 20x - 4 = 5x
m) 5 (1 - x) - 2x + 1 = -3 (2 + x
n) 4x = -8x + 36
o) 2 + 3 [x - (3x + 1)] = 5 [x - (2x - 1)]
p) 4 (x - 3) = 2x - 5
q) 1 - 2x = x/3 x/2
r) 3(x - 1)-2x/5 = 5(x - 3)/6
s) 2x+5/3x = ¼

Answer 1

A)
X/3+X/2=15
1,6X+2,5X/5=15
4X/5=15
75=4X
X=75/4=18,5

B)
X/2+X/4=2
2X+X/4=2
3X/4=2
8=3X
X=8/3=2,6

C)
0=X+12
-12+0=x
-12=X

D)
Y/4=3
12=Y

E)
X/5=2
X=10

F)
6x-4=2x+8
6x=2x+8+4
6x=2x+12
6x-2x=12
4x=12
x=12/4=3

G)
17X-2+4=10+5X
17X+2=10+5X
17X=10-2+5X
17X=8+5X
17X-5X=8
12X=8
X=8/12=0,6

H)

4X-10=2X+2
4X=2X+12
2X=12
X=6

I)
5x + 6x - 16 = 3x + 2x - 4
11X=5X+12
6X=12
X=2

J)
5 (2x - 4) = 7 (x + 1) -3
10x-20=7x+7-3
10x-20=7x+4
3x=24
X=24/3=8

K)
4 (x + 3) = 1
4X+12=1
4x= -11
X= -11/4= -2,75

L)
20x - 4 = 5x
20x=5x+4
15x=4
X=4/15=0,26

M)
5 (1 - x) - 2x + 1 = -3 (2 + x)
6-7x= -6-3x
-7x= -12-3x
-4x=-12
X= -12/-4=3

N)
4x = -8x + 36
4x+8x=36
12x=36
X=36/12=3

O)
2 + 3 [x - (3x + 1)] = 5 [x - (2x - 1)]
5(-2x+1)=5(-x-1)
-10x+5=-5x-5
-10+5=-10
-5x=-10
x=-10/-5=2

P)
4 (x - 3) = 2x - 5
4x-12=2x-5
2x=7
X=7/2=3,5

Q)
1 - 2x = x/3. x/2
1-2x=2x/5
5-10x=2x
5=12x
X=12/5= 2,4

R)
3(x - 1)-2x/5 = 5(x - 3)/6
3x-3/1 -2x/5=5x-3/6
15x-15-2x/5=5x-3/6
13x-15/5=5x-3/6
78x-90=25x-15
53x=75
X=75/53=1,41

S)
2x+5/3x = ¼
6x+5x/3x=1/4
11x/3x=1/4
3x=11x.4
-8x=4
X=4/-8=-0,5