Question

a)18x - 43 = 65
b) 23x - 16 = 14 - 17x
c) 10y - 5 (1 + y) = 3 (2y - 2) – 20
d) x - 17 = -9
e) 3. (x +2) + 5 = x + 12

Answer 1

Resposta:

a) x=6

b) x=3/4

c) y=21

d) x=8

e) x=1/2

Explicação passo-a-passo:

a)18x - 43 = 65

18x=65+43

18x=108

x=108/18

x=6

b)23x - 16 = 14 - 17x

23x+17x=14+16

40x=30

x=30/40

x=3/4

c)10y - 5 (1 + y) = 3 (2y - 2) – 20

10y-5-5y=6y-6-20

5y-6y=-26+5

-y=-21

y=21

d)x - 17 = -9

x=-9+17

x=8

e)3. (x +2) + 5 = x + 12

3x+6+5=x+12

3x-x=12-11

2x=1

x=1/2

Answer 2

Resposta:

Explicação passo-a-passo:

A)

18x - 43 = 65

18x = 65 + 43

18x = 108 (:2)

9x = 54 (:9)

x = 6

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

b)

23x - 16 = 14 - 17x

23x +17x = 14+16

40x = 30 (:10)

4x = 3

x = 3/4

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

c)

10y - 5. (1 + y) = 3 (2y - 2) – 20

10y - 5 - 5y = 6y - 6 - 20

5y - 5 = 6y - 26

26 - 5 = 6y - 5y

21 = y

y = 21

__________

d)

x - 17 = -9

x = - 9 + 17

x = 8

______________

e)

3. (x +2) + 5 = x + 12

3x + 6 + 5 = x + 12

3x + 11 = x + 12

3x - x = 12 - 11

2x = 1

x = 1/2