Question

resolva as equações

a) x+9=-12

b) y-3=10

c) 5x =-20

d) -4x=-8

e) 2x+1=13

f) -3x-2=16

g)6x+1=57

h)-5x-10=25

i) -10x+4=44

j) -4x+5=-15​

Answer 1

Resposta:

a) x + 9 = -12

x = -12 - 9

x = -21

b) y - 3 = 10

y = 10 + 3

y = 13

c) 5x = -20

x = $\frac{-20}{5}$

x = -4

d) -4x = -8

x = $\frac{-8}{-4}$

x = 2

e) 2x + 1 = 13

2x = 13 - 1

2x = 12

x = $\frac{12}{2}$

x = 6

f) -3x - 2 = 16

-3x = 16 + 2

-3x = 18

x = $\frac{18}{-3}$

x = -6

g) 6x + 1 = 57

6x = 57 - 1

6x = 56

x = $\frac{56}{6}$         simplifica, dividindo dois por 2.

x = $\frac{28}{3}$

h) -5x - 10 = 25

-5x = 25 + 10

-5x = 35

x = $\frac{35}{-5}$

x = -7

i) -10x + 4 = 44

-10x = 44 - 4

-10x = 40

x = $\frac{40}{-10}$

x = -4

j) -4x + 5 = -15​

-4x = -15​ - 5

-4x = - 20

x = $\frac{-20}{-4}$

x = 5

Explicação passo a passo:

Espero ter ajudadoooo, marca como melhor resposta :)

Answer 2

Resposta:

A)x=21

B)y=13

C)x=-4

D)x=2

E)x=6

F)x-6

G)x=28/3

H)x=7

I)x=-4

J)x=5

Explicação passo-a-passo:

A)x+9=-12

x+9=-12

x+9-9=-12-9

x=-12-9

x+9=-12

x=-12-9

-12-9

-(12+9)

-21

x=-12-9

x=21

resposta

x=21

B)y=-3=10

y=-3=10

y-3+3=10+3

y=10+3

y-3=10

y=10+3

y=13

resposta

y=13

C)5x=-20

5x=-20

5x÷5=-20÷5

x=-20÷5

5x÷5=-20÷5

x=-4

resposta

x=-4

D)-4x=-8

-4x=-8

-4x÷(-4)=-8÷(-4)

x=-8÷(-4)

-4x÷(-4)=-8÷(-4)

x=8÷4

-4x÷(-4)=-8÷(-4)

x=2

resposta

x=2

E)2x+1=13

2x+1=13

2x+1-1=13-1

2x=13-1

2x+1=13

2x=13-1

2x=12

2x÷2=12÷2

x=12÷2

2x÷2=12÷2

x=6

2x=12

x=6

resposta

x=6

F)-3x-2=16

-3x-2=16

-3x-2+2=16+2

-3x=16+2

-3x-2=16

-3x=16+2

-3x=18

-3x÷(-3)=18÷(-3)

x=18÷(-3)

-3x÷(-3)=18÷(-3)

x=-18÷3

-3x÷(-3)=18÷(-3)

x=-6

-3x=18

x=-6

resposta

x=-6

G)6x+1=57

6x+1=57

6x+1-1=57-1

6x=57-1

6x+1=57

6x=57-1

6x=56

6x÷6=56÷6

x=56÷6

6x÷6=56÷6

x=56/6

x=56/6 aqui risque os dois numeros 56 e 6.

x=28/3

6x=56

x=28/3

resposta

x=28/3

H)-5x-10=25

-5x-10=25

-5x-10+10=25+10

-5x=25+10

-5x-10=25

-5x=25+10

-5x=35

-5x÷(-5)=35÷(-5)

x=35÷(-5)

-5x÷(-5)=35÷(-5)

x=-35÷5

-5x÷(-5)=35÷(-5)

x=-7

-5x=35

x=7

resposta

x=7

i)-10x+4=44

-10x+4=44

-10x+4-4=44-4

-10x=44-4

-10x+4=44

-10x=44-4

-10x=40

-10x÷(-10)=40÷(-10)

x=40÷(-10)

-10x÷(-10)=40÷(-10)

x=-40÷10

-10x÷(-10)=40÷(-10)

x=-4

-10x=40

x=-4

resposta

x=-4

J)-4x+5=-15

-4x+5=-15

-4x+5-5=-15-5

-4x=-15-5

-4x+5=-15

-4x=-15-5

-15-5

-(15+5)

-20

-4x=-15-5

-4x=-20

-4x÷(-4)=-20+(-4)

x=-20÷(-4)

-4x÷(-4)=-20+(-4)

x=20÷4

-4x÷(-4)=-20÷(-4)

x=5

-4x=-20

x=5

resposta

x=5

espero ter te ajudado