Question

Calculați.
a) 3x-4=x+2(x+2)
b) -4x-36=0
c)2x+4=-10
d)-7=4x+1
e)-9x+27=0
f)5x=4x+1
g)(2x+1)=17
Va rog dau coroana Va rog urgent

Answer 1

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

3x-4=x+2x+4

3x-4=3x+4

3x-4=3x+4

-4=4

x € O

______________

-4x-36=0

-4x=36

x=-9

_______________

2x+4=-10

2x=-10-4

2x=-14

x=-7

________________

-7=4x+1

-4x-7=1

-4x=-8

x=-2

_______________

-9x+27=0

-9x=-27

x=3

______________

5x=4x+1

5x-4x=1

x=1

____________

(2x+1)=17

2x=17-1

2x=16

x=8

Answer 2

a)3x-4=x+2(x+2)

3x-4=x+2x+4

3x-4=3x+4

3x-4-3x-4=0

-8=0

b)-4x-36=0

-4x=36

x= 36:(-4)

x= -9

c) 2x+4= -10

2x= -10-4

2x= -14

x= -14:2

x= -7

d) -7=4x+1

-7-1=4x

-8=4x

x= -8:4

x=-2

e) -9x+27=0

-9x= -27

x= -27:(-9)

x=3

f) 5x=4x+1

5x-4x-1=0

x-1=0

x=1( aici nu cred ca e corect)

g) (2x+1)=17

( 2x+1)-17=0

-34-17=0

-51=0( nici aici nu cred ca e bine :( )

Sper ca te-am ajutat!