Question

EQUAÇÃO DE PRIMEIRO GRAU
me ajudem mm por favor​

Answer 1

Resposta:

a) x = 3

b) x = 5

c) x = 6

d) x = 8

e) x = 7/4

f) x = 1

g) x = 10

h) x = 1/3

Answer 2

a) 6 (x + 1) = 4 (x + 3)  

6x + 6 = 4x + 12

6x - 4x = 12 - 6

2x = 6

$x=\frac{6}{2} = 3$

b) 3 (2x - 1) + x = 32

6x - 3 + x = 32

6x + x = 32 + 3

7x = 35

$x=\frac{35}{7} = 5$

c) 8x = x + 42

8x - x = 42

7x = 42

$x=\frac{42}{7} =6$

d) x = 40 - 4x

x + 4x = 40

5x = 40

$x=\frac{40}{5} = 8$

e) x + 3x + 1 = 8

4x = 8 - 1

4x = 7

$x=\frac{7}{4} = 1,75$

f) 2 (x + 5) + 3 (x + 2) = x + 20

2x + 10 + 3x + 6 = x +20

2x + 3x -x = 20 - 10 - 6

4x = 4

$x=\frac{4}{4} = 1$

g) x + x + 1 + x + 2 = 33

3x = 33 - 2 - 1

3x = 30

$x=\frac{30}{3} =10$

h) 5 (x + 3) = 2 ( x + 8 )

5x + 15 = 2x + 16

5x - 2x = 16 - 15

3x = 1

$x=\frac{1}{3}= 0,333 ...$

Espero ter ajudado!