Question

Resolva as equação do 1°grau
b) 5x - 2 =12 - 2x

C) 4x-8+6x-3=12x-18

D) x+4x-4=9-2x-6

E)3x-8x+6=2-3x+3

F)4x-1=3(x-1)
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Answer 1

Resposta:

b) 5x-2=12-2x => 7x=14 => x=2

c) 4x-8+6x-3=12x-18 => 2x=7 => x=7/2

d) x+4x-4=9-2x-6 => 7x=7 =>x=1

e) 3x-8x +6=2-3x+3 => 2x=1 => x=1/2

f) 4x-1=3(x-1) =>x=-2

Explicação passo-a-passo:

Answer 2

b)

$5x - 2 = 12 - 2x \\ 5x + 2x = 12 + 2 \\ 7x = 14 \\ x = \frac{14}{7} \\ x = 2$

c)

$4x - 8 + 6x - 3 = 12x - 18 \\ 4x + 6x - 12x = - 18 + 8 + 3 \\ - 2x = - 7( - 1) \\ 2x = 7 \\ x = \frac{7}{2} \\ x = 3.5$

d)

$x + 4x - 4 = 9 - 2x - 6 \\ x + 4x + 2x = 9 - 6 + 4 \\ 7x = 7 \\ x = \frac{ 7}{7} \\ x = 1$

e)

$3x - 8x + 6 = 2 - 3x + 3 \\ 3x - 8x + 3x = 2 + 3 - 6 \\ - 2x = - 1( - 1) \\ 2x = 1 \\ x = \frac{1}{2} \\ x = 0.5$

f)

$4x - 1 = 3(x - 1) \\ 4x - 1 = 3x - 3 \\ 4x - 3x = - 3 + 1 \\ x = - 2$