Question

POZA!!!COROANA 50P!!!!​

Answer 1

Răspuns:

Explicație pas cu pas:

a)

1 + 1/2 = 2/2 + 1/2 = 3/2

7/3 - 1 = 7/3 - 3/3 = 4/3

3 - 3/2 = 6/2 - 3/2 = 3/2

(x - 1)*3/2 = 3/2*4/3 = 2

x - 1 = 2 : 3/2 = 2*2/3 = 4/3

x = 4/3 + 1 = 4/3 + 3/3 = 7/3

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b)

3*(2x + 1) = 4x + 3

6x + 3 = 4x + 3

6x - 4x = 3 - 3

2x = 0

x = 0

Answer 2

Explicație pas cu pas:

a)

$\dfrac{x - 1}{1 + \dfrac{1}{2}} = \dfrac{\dfrac{7}{3} - 1}{3 - \dfrac{3}{2}}$

$\dfrac{x - 1}{\dfrac{3}{2}} = \dfrac{\dfrac{4}{3}}{\dfrac{3}{2}} \iff x - 1 = \dfrac{4}{3}$

$x = \dfrac{4}{3} + 1 \implies \bf x = \dfrac{7}{3}$

b)

$\dfrac{2x + 1}{4x + 3} = \dfrac{1}{3}$

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

$6x + 3 = 4x + 3$

$6x - 4x = 3 - 3$

$2x = 0 \implies \bf x = 0$