Question

2. Resolva as equações:

a) 4x – 9 = 2x +3

b) 6x – 7 = 3x +8

c) 8x – 9 = 4x +7

d) 7x – 3 = 4x +6

e) 9x – 8 = 4x +7


alguém me ajudaa!!!​

Answer 1

Resposta:

$4x - 2x = 3 + 9 \ \\ 2x = 12 \\ x = \frac{12}{2} \\ x = 6 \\ \\ 6x - 3 \times = 8 + 7 \\ 3 \times = 15 \\ x = \frac{15}{3} \\ x = 5 \\ \\ 8x - 4x = 7 + 9 \\ 4x = 16 \\ x = \frac{16}{4} \\ x = 4 \\ \\ 7x - 4x = 6 + 3 \\ 3x = 9 \\ x = \frac{9}{3} \\ x = 3 \\ \\ 9x - 4x = 7 + 8 \\ 5x = 15 \\ x = \frac{15}{5} \\ x = 3$

Espero ter ajudado.

Answer 2

Resposta:

A) 6

B) 5

c) 4

d) 3

e) 15/13

Explicação passo-a-passo:

A) 4x - 9 = 2x + 3

4x - 2x = 3+9

2 x = 12 ------>>>>> X= 12/2 = 6

B) 6x - 7 = 3x + 8

6x -3x = 8+7

3x = 15 ------>>>>> X= 15/3 = 5

C) 8x -9 = 4x +7

8x -4x = 7 + 9

4x = 16 --->>> X= 16/4 = 4

D) 7x -3 = 4x +6

7x - 4x = 6 + 3

3x = 9 ----->>>>> X= 9/3 =3

E) 9x - 8 = 4+7

9x + 4x = 7+ 8

13x =15 ---->>> X= 15/ 13