Question

Me ajudem a resolver:)

a) x - 5 = -8
b) x/3 - 9 = 3
c) 8x + 3 = 3x - 37
d) -4x - 1 = x + 29
e) -9x + 10 = 3x - 2

Answer 1

a)

$x - 5 = - 8 \\ x = - 8 + 5 \\ x = - 3$

b)

$\frac{x}{3} - 9 = 3 \\ x - 9 = 3 \times 3 \\ x = 9 + 9 \\ x = 18$

c)

$8x + 3 = 3x - 37 \\ 8x - 3x = - 37 - 3 \\ 5x = - 40 \\ x = \frac{ - 40}{5} \\ x = - 8$

d)

$- 4x - 1 = x + 29 \\ - 4x - x = 29 + 1 \\ - 5x = 30 \: \times ( -1) \\ 5x = - 30 \\ x = \frac{ - 30}{5} \\ x = - 6$

e)

$- 9x + 10 = 3x - 2 \\ - 9x - 3x = - 2 - 10 \\ - 12x = - 12 \: \times ( - 1) \\ 12x = 12 \\ x = \frac{12}{12} \\ x = 1$

Answer 2

Resposta:

A: B. C. D. E.

X = -3. X= 36. X = -8. X = -6. X= 1

Explicação passo-a-passo:

A.)

X -5 = -8

X = -8 +5

X = -3

B.)

X/3 -9 =3

X/3 = 3+9

X = 12.3

X = 36

C.)

8x +3 = 3x -37

8x -3x = - 37 -3

5x = -40

X = -40/5

X = -8

D.)

-4x-1 = x +29

-5x =30 .(-1)

X = -30/5

x = -6

E.)

-9x +10= 3x -2

-12x = -12

-x = -12/12. .(-1)

x = 1