Question

por favor me ajudem.
b) 3x-5=x+7
C)6X+4=10
d)6+2x=11+x
e)8-4x=2
f)2x+7=5
g)3x+2=x-3
h)2m+6=m
i)2x+1=15
j)x+6=2-3x​

Answer 1

Resposta:

Explicação passo-a-passo:

b) 3x-5=x+7

3x-x=7+5

2x=12

x=12/2

x=6

C)6X+4=10

6x=10-4

6x=6

x=6/6

x=1

d)6+2x=11+x

2x-x=11-6

x=5

e)8-4x=2

-4x=2-8 (*-1)

4x=-2+8

4x=6

x=6/4

x=3/2

f)2x+7=5

2x=5-7

2x=-2

x=-2/2

x=-1

g)3x+2=x-3

3x-x=-3+2

2x=-1

x=-1/2

h)2m+6=m

2m-m=-6

m=-6

i)2x+1=15

2x=15-1

2x=14

x=14/2

x=7

j)x+6=2-3x​

x+3x=2-6

4x=-4

x=-4/4

x=-1

Answer 2

Resposta:

b) x = 6

c) x = 1

d) x = 5

e) x = 2,5

f) x = -1

g) x = 0,5

h) m = -6

i) x = 7

j) x = -1

Explicação passo-a-passo:

b) 3x - 5 = x + 7

3x - x = 7 + 5

2x = 12

x = 12 : 2

x = 6

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

c) 6x + 4 = 10

6x = 10 - 4

6x = 6

x = 6 : 6

x = 1

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

d) 6 + 2x = 11 + x

2x - x = 11 - 6

x = 5

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

e) 8 - 4x = 2

4x = 2 + 8

4x = 10

x = 10 : 4

x = 2,5

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

f) 2x + 7 = 5

2x = 5 - 7

2x = -2

x = -2 : 2

x = -1

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

g) 3x + 2 = x - 3

3x - x = 3 - 2

2x = 1

x = 1 : 2

x = 0,5

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

h) 2m + 6 = m

2m - m = -6

m = -6

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

i) 2x + 1 = 15

2x = 15 - 1

2x = 14

x = 14 : 2

x = 7

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

j) x + 6 = 2 - 3x

x + 3x = 2 - 6

4x = -4

x = -4 : 4

x = -1