Question

40PONTOS!!!!!URGENTE
a)4(x+10)-2(x-5)=0
b)3(2x+3)-4(x-5)=x-5
c)7(x-1)-2(x-5)=x-5
d)2(3-x)=3(x-4)+15
e)3(5-x)-3(1-2x)=42
f)(4x+6)-2x=(x-6)+10+14
g)(x-3)-(x+2)-2(x-1)-5=0
h)5x-3(x+2)=15

Answer 1

Resposta:

Explicação passo a passo:

a)

4(x+10)-2(x-5)=0

4x + 40 - 2x + 10 = 0

2x + 50 = 0

2x = - 50

X = - 50/2

X = - 25

____________

b)

3.(2x+3)-4(x-5)=x-5

6x + 9 - 4x + 20 = x - 5

2x + 29 = x - 5

2x - x = - 5 - 29

x = - 34

_________

c)

7(x-1)-2(x-5)=x-5

7X - 7 - 2X + 10 = X - 5

5x +3= x - 5

5x - x = -5-3

4x = - 8

X = - 8/4

X = - 2

_____________

d)

2.(3-x)=3.(x-4)+15

6 - 2x = 3x - 12 + 15

6 - 2x = 3x + 3

6 - 3 = 3x + 2x

3 = 5x

5x = 3

x = 3/5

e)

3.(5-x)-3(1-2x)=42

15 - 3x - 3 + 6x = 42

12 + 3x = 42

3x = 42-12

3x = 30

x = 30/3

x = 10

________

f)

(4x+6)-2x=(x-6)+10+14

4x + 6 - 2x = x - 6 + 24

2x + 6 = x + 18

2x - x = 18 - 6

X = 12

___________

g)

(x-3)-(x+2)-2(x-1)-5=0

X-3 - X - 2 - 2X + 2 - 5 = 0

- 5 - 2X - 3 = 0

- 8 = 2X

2x = - 8

x = - 8/2

X = - 4

____________

h)5x-3(x+2)=15

5x - 3x - 6 = 15

2x - 6 = 15

2x = 21

X = 21/2