Question

Me ajudem urgente como efetuar essas equaçoes
a)2x-10+7X+10=180
b)4x-18+3x=10
c)2x+5x+7=18
d)5x-91=4x-77
e)7x+1=5x-7
f)4x+5=x+20
g)3(x+1)+2(2x-3)=5(x+1)+8
h)2(x+5)-4=26
i)3(x+3)-5=22
j)2(2x+7)+3(3x-5)=3(4x-5)-1
k)3(x+2)=2(x-7)
l)4(2x-1)=3(x+2)
m)4(2m-1)+3m=2(4m-1)-(2-3)

por favor me ajudem

Answer 1

a) 9x = 180

x = 180/9

x = 20

b) 7x = 28

x = 28/7

x = 4

c) 7x = 18-7

7x = 11

x = 11/7

d) x = -77+91

x = 14

e) 2x = -6

x = -6/2

x = -3

f) 3x = 15

x = 15/3

x = 5

g) 3x + 3 + 4x - 6 = 5x + 5 + 8

7x - 3 = 5x + 13

2x = 16

x = 16/2

x = 8

i) 3x + 9 - 5 = 22

3x = 22 + 4

3x = 26

x = 26/3

j) 4x + 14 + 9x - 15 = 12x - 15 - 1

13x - 1 = 12x - 16

x = -15

k) 3x + 6 = 2x - 14

x = -8

l) 8x - 4 = 3x + 6

5x = 10

x = 10/5

x = 2

m) 8m - 4 + 3m = 8m - 2 - 2 + 3

3m = 3

m = 3/3

m = 1

Answer 2

Resposta:

Explicação passo-a-passo:

isolaor o (x))  ATENÇÃO no SINAL

a)

2x-10+7X+10=180  junta iguais

2x + 7x - 10 + 10 = 180

       9x    + 0 = 180

9x = 180

x = 180/9

x = 20

b)

4x-18+3x=10

4x + 3x - 18= 10

7x - 18 = 10

7x = 10 + 18

7x = 28

x = 28/7

x = 4

c)

2x+5x+7=18

7x + 7 = 18

7x = 18 - 7

7x = 11

x = 11/7

d)

5x-91=4x-77

5x - 91 - 4x = - 77

5x - 4x = - 77 + 91

1x = + 14

x = 14/1

x =14

e)

7x+1=5x-7

7x + 1 - 5x =  - 7

7x - 5x = - 7 - 1

2x = - 8

x = - 8/2

x = - 4

f)

4x+5=x+20

4x + 5 - x = 20

4x - x = 20 - 5

3x = 15

x = 15/3

x = 5

g)

3(x+1)+2(2x-3)=5(x+1)+8  faz multiplicação

3x +3  + 4x - 6 = 5x + 5 + 8

3x + 4x + 3 - 6 = 5x + 13

7x - 3 = 5x + 13

7x - 3 - 5x = 13

7x - 5x = 13 +3

2x = 16

x = 16/2

x = 8

h)

2(x+5)-4=26

2x + 10- 4 = 26

2x + 6 = 26

2x = 26 - 6

2x = 20

x = 20/2

x = 10

i)

3(x+3)-5=22

3x + 9 - 5 = 22

3x + 4 = 22

3x = 22 - 4

3x = 18

x = 18/3

x = 6

j)

2(2x+7)+3(3x-5)=3(4x-5)-1

4x  + 14 + 9x - 15 = 12x - 15 - 1

4x + 9x + 14 - 15 = 12x - 16

13x - 1 = 12x - 16

13x - 1 - 12x = - 16

13x - 12x = - 16 + 1

1x = - 15

x  = - 15/1

x = - 15

k)

3(x+2)=2(x-7)

3x + 6 = 2x - 14

3x + 6 - 2x = - 14

3x - 2x = - 14 - 6

1x = - 20

x = - 20/1

x = - 20

l)

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

4x - 4 = 3x + 6

4x - 4 - 3x = 6

4x - 3x = 6 + 4

1x = 10

x = 10/1

x = 10

m)

4(2m-1)+3m=2(4m-1)-(2-3)   olha o sinal

8m - 4  + 3m = 8m - 2 -(-1)  olha o sinal

8m + 3m - 4  = 8m - 2  + 1

11m - 4 = 8m - 1

11m - 4 - 8m = - 1

11m - 8m = - 1 + 4

3m = 3

m = 3/3

m = 1