Question

Calcule:
1) 2x-6=x
2) 2x-7=3x+3
3) 2.(x-6)=-2x+4
4) 3.(x-5)=3

Answer 1

1) 2x-6=x

2x-x=6

x=6

2) 2x-7=3x+3

-7-3=3x-2x

-10=x

3) 2(x-6)=-2x+4

2x-12=-2x+4

-12-4=-2x-2x

-16=-4x

x= -16/-4

x=4

4) 3(x-5)=3

3x-15=3

3x=3+15

x=18/3

x=6

Answer 2

Resposta:

1) 2x-6=x

2x-x= 6

x= 6

S={6}

-----------

2) 2x-7= 3x+3

2x-3x= 3+7

-x= 10

x=-10

S={-10}

----------------

3) 2.(x-6)= -2x+4

2x-12=-2x+4

2x+2x = 4+12

4x= 16

x= 16/4

x= 4

S={4}

------------

d) 3.(x-5)=3

3x-15= 3

3x= 3+15

3x= 18

x= 18/3

x= 6

S={6}