Question

Resolva as equações
A;6×=2×+16
B;4×.10=2×+2
C;2×+1=4×-7
D;3×-2=4×+9
E;5×+4=3×-2×-4
F;×+×-4=17-2×+1​

Answer 1

Resposta:

A)

6×=2×+16

6x -2x = 16

4x = 16

x = 16/4

x= 4

...

B)

4×.10=2×+2

40x -2x = 2

38x = 2

x = 38/2

x = 19

...

C)

2×+1=4×-7

2x -4x = -7 -1

-2x = -8

x = -8/-2

x = +4

...

D)

3×-2=4×+9

3x -4x = 9 +2

-x = 11

x = -11

...

E)

5×+4=3×-2×-4

5x -3x +2x = -4 -4

2x +2x = -8

4x = -8

x = -8/4

x = -2

...

F)

×+×-4=17-2×+1​

x + x +2x = 17 +1 +4

4x = 22

x = 22/4 simplificando por 2

x = 11/2

Explicação passo-a-passo:

Answer 2

Explicação passo-a-passo:

$a)6x = 2x + 16 \\ 6x - 2x = 16 \\ 4x = 16 \\ x = 16 \div 4 \\ x = 4$

$b)4x \times 10 = 2x + 2 \\ 40x = 2x + 2 \\ 40x - 2x = 2 \\ 38x = 2 \\ x = 38 \div 2 \\ x = 19$

$c)2x + 1 = 4x - 7 \\ 2x - 4x = - 7 - 1 \\ - 2x = - 8 \\ x = - 8 / - 2 \\ x = 4$

$d)3x - 2 = 4x + 9 \\ 3x - 4x = 9 + 2 \\ - x = 11 \: \: \: \: \: \: \: \: \: \times ( - 1) \\ x = - 11$

$e)5x+ 4 = 3x - 2x - 4 \\ 5x + 4 = x - 4 \\ 5x - x = - 4 - 4 \\ 4x = - 8 \\ x = - 8 \div 4 \\ x = - 2$

$f)x + x - 4 = 17 - 2x + 1 \\ 2x - 4 = 18 - 2x \\ 2x + 2x = 18 + 4 \\ 4x = 22 \\ x = 22 \div 4 \\ x = 5,5$

• Espero ter ajudado.