Question

a) 3 (2x - 3) = 5 (x +4)
b) 2 (3 -x) =3 (x - 4) +15
c) 4 (x+10) =2 (x - 5)
d) -3 (4x - 2) = -5 (2x -10)

Answer 1

Resposta:

Explicação passo-a-passo:

a) 3 (2x - 3) = 5 (x +4)

6x -9 = 5x + 20

6x - 5x = 20 + 9

x = 29

b) 2 (3 -x) =3 (x - 4) +15

6 - 2x = 3x - 12 + 15

-2x - 3x = 3 - 6

-5x = -3 (-)

x = 3/5

c) 4 (x+10) =2 (x - 5)

4x + 40 = 2x - 10

4x - 2x = -10 - 40

2x = -50

x = -50/2

x = -25

d) -3 (4x - 2) = -5 (2x -10)

-12x + 6 = -10x + 50

-12x + 10x = 50 - 6

-2x = 44

x = -44/2

x = -22