Question

2- Resolva as equações: b) a) 4x-1=3(x-1) 3(x-2)=2x-4 2(x - 1) = 3x + 4 c) e) d) 3(x-1)-7=15 7(x-4)=2x-3 f) 3(x-2) = 4(3-x) 3(3x-1)=2(3x + 2) 7(x-2) = 5(x+3) 3(2x - 1) = -2(x+3) j) 5x-3(x+2) = 15 k) g) h) i) 2x+3x+9=8(6-x) ​

Answer 1

Resposta:

a) 4x-1=3(x-1) Resp: x=-2

b) 3(x-2)=2x-4 Resp: x=2

c) 2(x - 1) = 3x + 4 Resp: x=-6

d) 3(x-1)-7=15 Resp: x=25/3

e) 7(x-4)=2x-3 Resp: x=5

f) 3(x-2) = 4(3-x) Resp: x=-18

g) 3(3x-1)=2(3x + 2) Resp: x=7/3

h) 7(x-2) = 5(x+3) Resp: x=1/2

i) 3(2x - 1) = -2(x+3) Resp: x=0

j) 5x-3(x+2) = 15 x=9/2

k)2x+3x+9=8(6-x) ​Resp: x=3

Explicação passo a passo:

a) 4x-1=3(x-1)

4x-1=3x-3

x=-3+1

x=-2

b) 3(x-2)=2x-4

3x-6=2x-4

x=-4+6

x=2

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

2x-2=3x+4

-x=6

x=-6

d) 3(x-1)-7=15

3x-3-7=15

3x=15+10

x=25

    3

e) 7(x-4)=2x-3

7x-28=2x-3

5x=-3+28

x=25

     5

x=5

f) 3(x-2) = 4(3-x)

3x-6=12-4x

-x=18

x=-18

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

9x-3=6x+4

3x=4+3

x = 7

     3

h) 7(x-2) = 5(x+3)

7x-14=5x+15

2x=15-14

x= 1

   2

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

6x-6=-2x-6

8x=-6+6

8x=0

x=0

j) 5x-3(x+2) = 15

5x-3x+6=15

2x=15-6

x= 9

   2

k)2x+3x+9=8(6-x)

5x=48-8x-9

13x=39

x=3