Question

Pfv resolvam pelo menos algumas...

Answer 1

a)
$3x-5=x+3$
$3x-x=3+5$
$2x=8$
$x=4$

b)
$4(x-3)+2(x-1)=0$
$4x-12+2x-2=0$
$4x+2x=12+2$
$6x=14$

$x=\frac{14}{6}$

$x=\frac{7}{3}$

c)
$\frac{a^3+a^2\cdot b^0+a+1}{a^4-1}$

$\frac{2^3+2^2\cdot4^0+2+1}{2^4-1}$

$\frac{8+4\cdot1+3}{16-1}$

$\frac{15}{15}$

$1$

d)
$\frac{2}{3}+\frac{3}{4}$

$\frac{2}{3}\cdot\frac{4}{4}+\frac{3}{4}\cdot\frac{3}{3}$

$\frac{8}{12}+\frac{9}{12}$

$\frac{8+9}{12}$

$\frac{17}{12}$

e)
$\frac{\frac{4}{5}}{\frac{5}{4}}$

$\frac{4}{5}\cdot\frac{4}{5}$

$\frac{16}{25}$

A F não entendi a expressão.