Question

Resolva as equações abaixo e encontre o valor de x:

a) 20x-30=40+30-20

b)18x-43=65

c) 23x-16=14-17

d) 10y-5 (1+y)=3 (2y-2)-20

e) 3 (x+4)+2 (x+2)=2x+12

f)-4(x+6)-x=5x

g) (x-5)/10+(1-2x)/5=(3-x)/4

gente preciso da resposta hj.​

Answer 1

a) 20x-30=40+30-20

20x-30=70-20

20x-30=50

20x=50+30

20x=80

x=80/20

x=4

b)18x-43=65

18x=65+43

18x=108

x=108/18

x=6

c) 23x-16=14-17

23x-16=-3

23x=-3+16

23x=13

x=13/23

d) 10y-5 (1+y)=3 (2y-2)-20

10y-5-5y=3(2y-2)-20

5y-5=3(2y-2)-20

5y-5=6y-6-20

5y-5=6y-26

5y-5-6y=-26

-y-5=-26

-y-5=-26+5

-y=-21

y=21

e) 3 (x+4)+2 (x+2)=2x+12

3x+12+2(x+2)=2x+12

3x+12+2x+4=2x+12

5x+12+4=2x+12

5x+16=2x+12

5x+16-2x=12

3x+16=12

3x=12-16

3x=-4

x=-4/3

x=- 4/3

f)-4(x+6)-x=5x

-4-24-x=5x

-5x-24=5x

-5x-24-5x=0

-10x-24=0

-10x=24

x=24/-10

x=-12/5

g) (x-5)/10+(1-2x)/5=(3-x)/4

2(x-5)+4(1-2x)=5(3-x)

2x-10+4(1-2x)=5(3-x)

2x-10+4-8x=5(3-x)

2x-6-8x=5(3-x)

-6x-6=5(3-x)

-6x-6=15-5x

-6x-6+5x=15

-x-6=15

-x=15+6

-x=21

x=-21