Question

me ajudem por favor ​

Answer 1

Explicação passo-a-passo:

$1.)$

$a) \frac{x}{4} - \frac{x}{6} = 3 \\ m.m.c = 12$

$3x - 2x = 36 \\ x = 36$

$b) \frac{3x}{4} - \frac{x}{3} = 5$

$m.m.c = 12$

$9x - 4x = 60 \\ 5x = 60 \\ x = \frac{60}{5}$

$x = 12$

$c) \frac{x}{5} - 1 = 9$

$\frac{x}{5} = 9 + 1$

$\frac{x}{5} = 10$

$x = 5.10$

$x = 50$

$d) \frac{x}{3} - 5 = 0$

$\frac{x}{3} = 5$

$x = 3.5$

$x = 15$

2.

a)

$x + 5 = \frac{x}{2} + 7$

m.m.c=2

$2x + 10 = x + 14 \\ 2x - x = 14 - 10 \\ x = 4$

$b)3x - 40 = \frac{x}{2} + 20 \\ 3x - \frac{x}{2} = 20 + 40$

$3x - \frac{x}{2} = 60$

m.m.c=2

$6x - x = 120 \\ 5x = 120 \\ x = \frac{120}{5}$

$x = 24$

Answer 2

Resposta:

a) x/4 – x/6 = 3

x/4.6 – x/6.4 = 3/24

6.x/24 – 4.x/24 = 3.24

6x-4x = 72

2x = 72

X = 72/2

X = 36

B)  3x/4 – x/3 = 5

     3x/4.3 – x/3.4 = 5/12

     3x.3/12 – x.4/12 = 5.12

     9x – 4x = 60

     5x = 60

     X = 12

c) x/5 – 1 = 9

x/5.1 – 1/5 = 9/5

x.1/5 – 1.5/5 = 9.5/5

x – 5 = 45

x = 45+5

x = 50

d) x/3 – 5 = 0

x/3.1 – 5/1.3 = 0

x – 15 = 0

x = 15

2 –  

a) x + 5 = x/2 + 7

x+5/1.2 = x/2 + 7/1.2

x.2 + 5.2/2 = x.1/2 + 7.2/2

2x + 10 = x+14

2x-x = 14-10

X = 4

b) 3x – 40 = x/2 + 20

3x – 40/1.2 = x/2 + 20/1.2

3x.2 – 40.2/2 = x/2 + 20.2/2

6x – 80 = x + 40

6x – x = 40 + 80

5x = 120

X = 120/5

X = 24

Explicação passo a passo: