Question

A)
$- 3 (x + \frac{5}{3} ) = 2(2 x - 3)$
B)
$\frac{7 - n}{4} = \frac{n + 1}{2}$
C)
$19 - 4 - 3( \times - 4 \times ) = - 2 \times$
D)
$\frac{x}{3} - 2 = \frac{x}{5}$
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Answer 1

Resposta:

Explicação passo a passo:

a)

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

b)

$\frac{7-n}{4} =\frac{n+1}{2} \\\\2(7-n)=4(n+1)\\14-2n=4n+4\\-2n-4n=4-14\\-6n=-10\\n=\frac{10}{6} =\frac{5}{3}$

c)

$19-4-3(x-4x)=-2x\\15-3x+12x=-2x\\9x+2x=-15\\11x=-15\\x=-\frac{15}{11}$

d)

$\frac{x}{3} -2=\frac{x}{5} \\\\\frac{5x-30=3x}{15} \:\:\:.15\\\\5x-30=3x\\5x-3x=30\\2x=30\\x=15$

Espero ter ajudado!

Desculpe qualquer erro.