Question

Exercițiile 3 și 4 vă rog!!! Este URGENT!! ​

Answer 1

Răspuns:

Explicație pas cu pas:

x + 3 = 0

x = -3

_________

-x + 9 = 2

x = 9 - 2 = 7

__________

3x + 3 = -3

3x = -3 - 3 = -6

x = -6 : 3 = -2

____________

-4x - 4 = 12

4x = -4 - 12 = -16

x = -16 : 4 = -4

_____________

3x = -15

x = -15 : 3 = -5

_____________

-6x = 36

x = 36 : (-6) = -6

____________

x : (-2) = 5

x = -2*5 = -10

____________

x : 9 = -11

x = -11*9 = -99

______________________________

x : 3 = -12

x = -12*3 = -36

_______________

x : (-4) = -10

x = -10*(-4) = 40

_______________

x : 7 = -8

x = -8*7 = -56

________________

x : (-7) = -9

x = -9*(-7) = 63

_____________

x : (+6) = -12

x = -12*(+6) = -72

____________

x : 8 = -5

x = -5*8 = -40

_____________

x : (-12) = 11

x = -12*11 = -132

____________

x : (-25) = -25

x = (-25)*(-25) = 625

Answer 2

Exercitiul 3)

a)

$\bf x + 3 = 0\\\\\boxed{\bf x = -3}$

b)

$\bf -x + 9 = 2\\\\x = 9 - 2\\\\\boxed{\bf x = 7}$

c)

$\bf 3x + 3 = -3\\\\3x = -3 - 3\\\\3x= -6\\\\x = -6 : 3\\\\\boxed{\bf x= -2}$

d)

$\bf -4x - 4 = 12\\\\4x = -4 - 12\\\\4x = -16\\\\x = -16 : 4\\\\\boxed{\bf x = -4}$

 e)

$\bf 3x = -15\:\:|:3\\\\\boxed{\bf x = -5}$

f)

$\bf -6x = 36\:\:|:(-6)\\\\\boxed{\bf x= -6}$

g)

$\bf x : (-2) = 5\:\:|\cdot (-2)\\\\\boxed{\bf x = -10}$

h)

$\bf x : 9 = -11\:\:|\cdot 9\\\\\boxed{\bf x = -99}$

===========================

Exercitiul 4)

a)

$\bf x : 3 = -12\:\:|\cdot 3\\\\\boxed{\bf x=-36}$

b)

$\bf x : (-4) = -10\:\:|\cdot (-4)\\\\\boxed{\bf x = 40}$

c)

$\bf x : 7 = -8\:\:|\cdot 7\\\\\boxed{\bf x= -56}$

d)

$\bf x : (-7) = -9\:\:|\cdot (-7)\\\\\boxed{\bf x = 63}$

e)

$\bf x : (+6) = -12\:\:|\cdot 6\\\\\boxed{\bf x = -72}$

f)

$\bf x : 8 = -5\:\:|\cdot 8\\\\\boxed{\bf x=-40}$

g)

$\bf x : (-12) = 11\:\:\:|\cdot (-12)\\\\\boxed{\bf x = -132}$

h)

$\bf x : (-25) = -25\:\:\:|\cdot (-25)\\\\\boxed{\bf x = 625}$