Question

Me ajudem, tenho q entregar amanhã..

Answer 1

Resposta:

a) x= 12

b) x = -18/3 = 6

c) x = 18/6 = 3

d) -2x = 12

e) x = 8/2 = 4

f) x = -360/6 = 60

g) g) 2x + 5 - 5x = -1

h) x = -3

i) x = 4/2 = 2

j) x = 1/5

k) x = 14/5

l) x = 12/11

m) x = 20/4 = 5

n) x = -1

o) x = 42/14 = 3

p) x = 2

q) x = 5

r) x = 8/4 = 2

s) x = -88

Explicação passo-a-passo:

a) 3x - 7 = 2x + 5

3x - 2x = 5+7

x = 12

b) 7x + 8 = 4x - 10

7x - 4x = -10 -8

3x = -18

x = -18/3 = 6

c) 4x - 15 = -2x + 3

4x + 2x = 3 + 15

6x = 18

x = 18/6 = 3

d) 2x - 4 -7 = 4x

2x - 4x = 4 + 8

-2x = 12

x = -(12/2) = -8

e) 3x = x + 1 + 7

3x - x = 8

x = 8/2 = 4

f) 360 + 36x = 30x

36x - 30x = -360

x = -360/6 = 60

g) 2x + 5 - 5x = -1

2x - 5x = -1 - 5

-3x(-1) = -6(-1)

x = 6/3 = 2

h) 5 + 6x = 5x + 2

6x - 5x = 2 - 5

x = -3

I) x + 2x - 1 - 3 = x

3x - x = 1 + 3

2x = 4

x = 4/2 = 2

J) -3x + 10 = 2x + 8 + 1

-3x - 2x = 8 + 1 - 10

-5x(-1) = -1(-1)

x = 1/5

k) 5x - 5 + x = 9 + x

6x - x = 9 + 5

5x = 14

x = 14/5

I) 7x - 4 - x = -2x + 8 - 3x

6x + 2x + 3x = 8 + 4

11x = 12

x = 12/11

m) -x - 5 + 4x = -7x + 6x + 15

-x + 4x + 7x - 6x = 15 + 5

4x = 20

x = 20/4 = 5

n) 3x - 2x = 3x + 2

x - 3x = 2

-2x = 2

x = -1

o) 2 - 4x = 32 - 18x + 12

-4x + 18x = 32 + 12 - 2

14x = 42

x = 42/14 = 3

p) 2x - 1 = -3 + x + 4

2x - x = -3 + 4 + 1

x = 2

q) 3x - 2 - 2x - 3 = 0

3x - 2x = 2 + 3

x = 5

r) 10 - 9x + 2x = 2 - 3x

-9x + 2x + 3x = 2 - 10

-4x(-1) = -8(-1)

x = 8/4 = 2

s) 4x - 4 - 5x = -6 + 90

4x - 5x = -6 + 90 + 4

-x(-1) = 88(-1)

x = -88