Question

1) Resolva as equações (com calculo)

a)3x+3+33

b)4x-1=19

c)64+3=54

d)x+7=4

e)7x+3=2x+23

f)2y+12=y-3

g)4(x+3)=20

h)2(3y+1)=11

j)10-2(x+3)=8+3(2x+5)

k)2(y-1)+3(y-2)=-23

L)y-2(x-1)=4-3(x-2)

Answer 1

a) x = 10

b) x = 5

c) incompleta

d) x = - 3

e) x = - 4

f) y = 15

g) x = 2

h) y = 3/2

j) x = - 19/8

k) y = 15

l) x + y = 8

a) 3x + 3 = 33

3x = 33 - 3

3x = 30

x = 30/3

x = 10

b) 4x - 1 = 19

4x = 19 + 1

4x = 20

x = 20/4

x = 5

c) 64 + 3 = 54

Incompleta

d) x + 7 = 4

x = 4 - 7

x = - 3

e) 7x + 3 = 2x + 23

7x - 2x = 23 - 3

5x = 20

x = 20/5

x = 4

f) 2y + 12 = y - 3

2y - y = - 3 - 12

y = - 15

g) 4(x + 3) = 20

4x + 12 = 20

4x = 20 - 12

4x = 8

x = 8/4

x = 2

h) 2(3y + 1) = 11

6y + 2 = 11

6y = 11 - 2

6y = 9

y = 9/6

y = 3/2

j) 10 -2(x + 3) = 8 + 3(2x + 5)

10 - 2x - 6 = 8 + 6x + 15

- 2x + 4 = 6x + 23

- 2x - 6x = 23 - 4

- 8x = 19

x = - 19/8

k) 2(y - 1) + 3(y - 2) = -23

2y - 2 + 3y - 6 = - 23

2y - 3y - 8 = - 23

- y = - 23 + 8

- y = - 15

y = 15

L) y - 2(x - 1) = 4 - 3(x - 2)

y - 2x + 2 = 4 - 3x + 6

y - 2x + 2 = - 3x + 10

y - 2x + 3x = 10 - 2

y + x = 8