Question

resolva as seguintes esquações:(pfv me ajudem deixei foto p vcs se puderem respondam a 3 tbm pfv)​​

Answer 1

Resposta:

2.

a)

2x+1=5

2x=4

x=2

b)

4+2x=-8

2x=-12

x=-6

c)

-3-5x=12

-5x=12+3

-5x=15

5x=-15

x=-3

d)

-7-2x=-9

2x=9-7

2x=2

x=1

e)

4x-4=20

4x=24

x=6

f)

-9x+28=10

-9x=10-28

-9x=-18

9x=18

x=2

3.

a)

9x+2=7x

9x-7x=-2

2x=-2

x=-1

b)

11x+17=10x+13

11x-10x=13-17

x=-4

c)

3x-11=x-11

3x-x=-11+11

2x=0

x=0

d)

4x-12=x

4x-x=12

3x=12

x=4

e)

5x+21=10x-19

5x-10=-19-21

-5x=-40

5x=40

x=8

f)

x+8=-x+2

x+x=2-8

2x=-6

x=-3

g)

x+5=-3x+9

x+3x=9-5

4x=4

x=1

h)

8x+2=5x-10

8x-5x=-10-2

3x=-12

x=-4

i)

8x-40=5x+80

8x-5x=80+40

3x=120

x=40