Question

podem me ajudar e pra hj por favor​

Answer 1

Resposta:

1_A) 6

B) -5

C) 1

D) 7

E) -2,5

F) 404 not found

G) 14

H) 404 not found

2_ Alternativa D.

3_ Alternativa B.

4_ 404 not found

Explicação passo-a-passo:

1_A) 21x - 17 = 109

21x = 109 + 17

21x = 126 ➡️ x = 6

B) 73x + 100 = 53x

73x - 53x = -100

20x = -100 ➡️ x = -5

C) 1,7 + 2,5x = 4,2

2,5x = 4,2 - 1,7

2,5x = 2,5 ➡️ x = 1

D) 23x - 22 = 19x + 6

23x - 19x = 6 + 22

4x = 28 ➡️ x = 7

E) 12x - 16 = -21 + 10x

12x - 10x = -21 + 16

2x = -5 ➡️ x = -2,5

F) 404 not found

G) 10 (x + 1) - 5 (x - 2) = 70

10x + 10 - 5x - 10 = 70

10x - 5x = 70 - 10 + 10

5x = 70 ➡️ x = 14

H) 404 not found

2_ -2⁴ + (-3)²

16 + 9 = 25

3_ 2x² - 3x + 10 =

-16 - (-6) + 10 =

-10 + 10 = 0

4_ 404 not found