Question

Calcule as seguintes equações, sendo U = Q :

a) 5 x + 1 = 36 e) 3 x + 9 =12

b) 9 x – 7 = 5 x + 13 f) 4 x + 2 + x = 3 x + 8

c) 3 x – 8 = 13 g) 5 (x – 3) = 2 x + 3

d) 8 x – 9 = 3 x + 11 h) 4 (2 x – 3) = 5 (x +3)​

Answer 1

Resposta:

Olá

Explicação passo-a-passo:

vamos

a)

$5x + 1 = 36 \\ 5x = 35 \\ x = \frac{35}{5} \\ x = 7$

b)

$9x - 7 = 5x + 13 \\ 9x - 5x = 13 + 7 \\ 4x = 20 \\ x = \frac{20}{4} \\ x = 5$

c)

$3x - 8 = 13 \\ 3x = 21 \\ x = \frac{21}{3} \\ x = 7$

d)

$8x - 9 = 3x + 11 \\ 8x - 3x = 11 + 9 \\ 5x = 20 \\ x = \frac{20}{5} \\ x = 4$

e)

$3x + 9 = 12 \\ 3x = 3 \\ x = \frac{3}{3} \\ x = 1$

f)

$4x + 2 + x = 3x + 5 \\ 4x + x - 3x = 5 - 2 \\ 2x = 3 \\ x = \frac{3}{2}$

h)

$5(x - 3) = 2x + 3 \\ 5x - 15 = 2x + 3 \\ 5x - 2x = 3 + 15 \\ 3x = 18 \\ x = \frac{18}{3} \\ x = 6$

i)

$4(2x - 3) = 5(x + 3) \\ 8x - 12 = 5x + 15 \\ 8x - 5x = 15 + 12 \\ 3x = 27 \\ x = \frac{27}{3} \\ x = 9$

espero ter ajudado!

feito por Zacarias Júlio Mariano 'UR'

Answer 2

Explicação passo-a-passo:

5 x + 1 = 36

5x=36-1

5x=35

x=35/5

x=> 7

9 x – 7 = 5 x + 13

9x-5x=13+7

4x=20

x=20/4

x=> 5

3 x – 8 = 13

3x=13+8

3x=21

x=21/3

x=7

8 x – 9 = 3 x + 11

8x-3x=11+9

5x=20

x=20/5

x=>4

3 x + 9 =12

3x=12-9

3x=3

x=3/3

x=>1

4 x + 2 + x = 3 x + 8

5x+2=3x+8

5x-3x=8-2

2x=6

x=6/2

x=>3

5 (x – 3) = 2 x + 3

5x-15=2x+3

5x-2x=3+15

3x=18

x=18/3

x=>6

4 (2 x – 3) = 5 (x +3)

8x-12=5x+15

8x-5x=15+12

3x=27

x=27/3

x=>9