Question

Pfv alguémmmmmmmmmmmmmmmmmmmmmmmmmm

Answer 1

Resposta:

Olá bom dia!

$\frac{3x}{4} - \frac{3}{2} =\frac{3}{4} -\frac{5x-7}{4} \\\\\frac{1.(3x) - 2.(3)}{4} = \frac{5x -7}{4} \\\\\frac{3x -6}{4} = \frac{5x -7}{4} \\\\\\3x -6 = 5x - 7\\\\2x - 5x = -7 + 1\\\\-3x = -6\\\\.(-1)\\\\3x = 6\\\\x = 6 : 3\\\\x = 2$=> Resposta

S = {2}

Answer 2

Olá!!!

Resposta...

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Para está, precisamos encontrar o valor de x na equação, veja:

$\tt =\dfrac{3x}{4}-\dfrac{3}{2}=\dfrac{3}{4}-\dfrac{5x-7}{4}$

Multiplicamos ambos os lados por 4:

$\tt \dfrac{3x}{4}\cdot \:4-\dfrac{3}{2}\cdot \:4=\dfrac{3}{4}\cdot \:4-\dfrac{5x-7}{4}\cdot \:4$

Simplifique:

$\tt 3x-6=3-\left(5x-7\right)$

Continuando:

$\tt 3x-6=-5x+10$

Adicione 6 a ambos os lados:

$\tt 3x-6+6=-5x+10+6$

Simplifique:

$\tt 3x=-5x+16$

Adicione 5x a ambos os lados:

$\tt 3x+5x=-5x+16+5x$

Simplifique:

$\tt 8x=16$

Divida ambos os lados por 8:

$\tt \dfrac{8x}{8}=\dfrac{16}{8}$

Simplifique:

$\fbox{\fbox{\tt x=2}}$