Question

4) Resolva as seguintes equações:
a) 4x - 1 = 3(x - 1)
b) 3(x - 2) = 2x - 4
c) 3(x - 2) = 4(3-X)
d) 7(x - 2) = 5(x + 3)
e) 5x-3(x + 2) = 15
f) 3(2x-1) = -2(x + 3)​

Answer 1

Resposta:

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

4x - 1 = 3x - 3

4x - 3x = - 3 + 1

x = -2

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

3x - 6 = 2x - 4

3x - 2x = -4 + 6

x = 2

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

3x - 6 = 12 - 4x

3x + 4x = 12 + 6

7x = 18

x = 2,5714285714...

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

7x - 14 = 5x + 15

7x - 5x = 15 + 14

2x = 29

x = 14,5

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

5x - 3x - 6 = 15

2x = 15 + 6

2x = 21

x = 10,5

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

6x - 3 = -2x - 6

6x + 2x = -6 + 3

8x = -3

x = -3 ÷ 8

x = -0,375

Explicação passo-a-passo:

espero ter ajudado de alguma forma

Answer 2

Resposta:

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

4x-1=3x-3

4x-3x=-3+1

X=-2

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

3x-6=2x-4

3x-2x=-4+6

X=2

c) 3(x - 2) = 4(3-X)

3x-6=12-4x

3x+4x=12+6

7x=18

X=18/7

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

7x-14=5x+15

7x-5x=15+14

2x=29

X=29/2

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

5x-3x-6=15

2x=15+6

2x=21

X=21/2

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

6x-3=-2x-6

6x+2x=-6+3

8x=-3

X=-3/8