Question

Resolva as equações
:

a)2x+5-5x=-1


b)5+6x=5x+2


c)x+2x-1-3=x


d)-3x+10=2x+8+1


e)5x-5+x=9+x

f)7x-4-x=-2x+8-3x


g)10-9x+2x=2-3x


h)7(x-5)=3(x+1)


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


j)5(x+1)-3(x+2)=0


l)4(x+5)+3(x+5)=21


m)2(x+5)-3(x-5)=10


n)8(x-1)=8-4(2x-3)


o)13+4(2x-1)=5(x+2)​

Answer 1

Resposta:

Explicação passo-a-passo:

a)2x+5-5x=-1

2x-5x = -1-5

-3x = -6 .(-1)

3x = 6

x= $\frac{6}{3}$

x=2

b)5+6x=5x+2

6x-5x=2-5

x=-3

c)x+2x-1-3=x

x+2x-x=+1+3

3x-x = 4

2x=4

x=$\frac{4}{2}$

x=2

d)-3x+10=2x+8+1

-3x-2x=8+1-10

-5x=9-10

-5x=-1 .(-1)

5x=+1

x=$\frac{1}{5}$

e)5x-5+x=9+x

5x+x-x=9+5

6x-x = 14

5x=14

x=$\frac{14}{5}$

f)7x-4-x=-2x+8-3x

7x-x+2x+3x=8+4

6x+5x=12

11x=12

x=$\frac{12}{11}$

g)10-9x+2x=2-3x

-9x+2x+3x=2-10

-9x+5x=-8

-4x=-8 .(-1)

4x=8

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

x=2

h)7(x-5)=3(x+1)

7x-35=3x+3

7x-3x=3+35

4x=38

x=$\frac{38}{4} =\frac{19}{2}$

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

3x-6=-4x+12

3x+4x=12+6

7x=18

x=$\frac{18}{7}$

j)5(x+1)-3(x+2)=0

5x+5-3x-6=0

5x-3x=-5+6

2x=1

x=$\frac{1}{2}$

l)4(x+5)+3(x+5)=21

4x+20+3x+15=21

4x+3x=21-20-15

7x=-14

x=$-\frac{14}{7}$

x=-2

m)2(x+5)-3(x-5)=10

2x+10-3x+15=10

2x-3x=10-10-15

-x=-15 .(-1)

x=15

n)8(x-1)=8-4(2x-3)

8x-8=8-8x+12

8x+8x=12+8+8

16x=28

x=$\frac{28}{16}$

x=$\frac{7}{4}$

o)13+4(2x-1)=5(x+2)​

13+8x-4=5x+10

8x-5x=10-13+4

3x=1

x=$\frac{1}{3}$