Question

Resolva as equações do 1° grau:
a) 5x – 15 = 60

b)2x/3 + 3x/4− x/2 = 22

c) 2. (3x + 1) − 3. (6 − 2x) = 20
pfvrrr me ajudemm

Answer 1

Resposta:

(a) x = 15

(b) x = 24

(c) x = 3

Explicação passo a passo:

(a) 5x – 15 = 60

    5x = 60 + 15

    5x = 75

    x = 75 / 5

    x = 15

(b) 2x/3 + 3x/4− x/2 = 22

    x (2/3 + 3/4 - 1/2) = 22

    x = 22 / (2/3 + 3/4 - 1/2)

    x = 22 / ((8+9-6)/12)

    x = 22 / (11/12)

    x = 22 * 12 / 11

    x = 264 / 11

    x = 24

(c) 2. (3x + 1) − 3. (6 − 2x) = 20

   6x + 2 - 18 + 6x = 20

   12x - 16 = 20

   12x = 20 + 16

   12x = 36

   x = 36 / 12

   x = 3