Question

Preciso disso Urgente com as contas feitas (estou dando 100 pontos)

Answer 1

Questão 1)

$a)~2x-4=8-2\cdot(3x+2)\\ \\ 2x-4=8-6x-4\\ \\ 2x+6x=8-4+4\\ \\ 8x=8\\ \\ x=8\div8\\ \\ \boxed{x=1}$

$b)~2\cdot(5x+3)=2\cdot(4x+18)\\ \\ 10x+6=8x+36\\ \\ 10x-8x=36-6\\ \\ 2x=30\\ \\ x=30\div2\\ \\ \boxed{x=15}$

$c)~3x+3\cdot(5x+2)=8\\ \\ 3x+15x+6=8\\ \\ 3x+15x=8-6\\ \\ 18x=2\\ \\ x=2/18\\ \\ \boxed{x=1/9}$

$d)~2\cdot(x+4)=4x+11\\ \\ 2x+8=4x+11\\ \\ 2x-4x=11-8\\ \\ -2x=3\\ \\ \boxed{x=-3/2}$

Questão 2)

$a)~4x-1=11\\ \\ 4x=11+1\\ \\ 4x=12\\ \\ x=12\div4\\ \\ \boxed{x=3}$

$b)~9x+6=8x\\ \\ 9x-8x=-6\\ \\ \boxed{x=-6}$

$c)~3x-1=x\\ \\ 3x-x=1\\ \\ 2x=1\\ \\ \boxed{x=1/2}$

$d)~11x+12=9x+13\\ \\ 11x-9x=13-12\\ \\ 2x=1\\ \\ \boxed{x=1/2}$

$e)~x-3=0\\ \\ x=0/3\\ \\ \boxed{x=0}$

$f)~x+5=11\\ \\ x=11-5\\ \\ \boxed{x=6}$

$g)~5x=4x+12\\ \\ 5x-4x=12\\ \\ \boxed{x=12}$

$h)~2x=24\\ \\ x=24\div2\\ \\ \boxed{x=12}$

$i)~2x=-40\\ \\ x=-40\div2\\ \\ \boxed{x=-20}$

$j)~7x=1\\ \\ \boxed{x=1/7}$

$k)~9x=5\\ \\ \boxed{x=5/9}$

$l)~3m=12\\ \\ m=12\div3\\ \\ \boxed{m=4}$

$m)~3y+1=13\\ \\ 3y=13-1\\ \\ 3y=12\\ \\ y=12\div3\\ \\ \boxed{x=4}$

$n)~9y-2=8y\\ \\ 9y-8y=2\\ \\ \boxed{y=2}$

$o)~3y+1=2y\\ \\ 3y-2y=-1\\ \\ \boxed{y=-1}$

$p)~y-9=0\\ \\ \boxed{y=9}$

$q)~y-6=12\\ \\ y=12+6\\ \\ \boxed{y=18}$

$r)~5y=3y+8\\ \\ 5y-3y=8\\ \\ 2y=8\\ \\ y=8\div2\\ \\ \boxed{x=4}$

$s)~3y=15\\ \\ y=15\div3\\ \\ \boxed{y=5}$

$t)~5y=35\\ \\ y=35\div5\\ \\ \boxed{y=7}$

$u)~3y=33\\ \\ y=33\div3\\ \\ \boxed{y=11}$

:)

Answer 2

Resposta:

a) 2x−4=8−2⋅(3x+2)2x−4=8−6x−42x+6x=8−4+48x=8x=8÷8x=1

\begin{gathered}b)~2\cdot(5x+3)=2\cdot(4x+18)\\ \\ 10x+6=8x+36\\ \\ 10x-8x=36-6\\ \\ 2x=30\\ \\ x=30\div2\\ \\ \boxed{x=15}\end{gathered}b) 2⋅(5x+3)=2⋅(4x+18)10x+6=8x+3610x−8x=36−62x=30x=30÷2x=15

\begin{gathered}c)~3x+3\cdot(5x+2)=8\\ \\ 3x+15x+6=8\\ \\ 3x+15x=8-6\\ \\ 18x=2\\ \\ x=2/18\\ \\ \boxed{x=1/9}\end{gathered}c) 3x+3⋅(5x+2)=83x+15x+6=83x+15x=8−618x=2x=2/18x=1/9

\begin{gathered}d)~2\cdot(x+4)=4x+11\\ \\ 2x+8=4x+11\\ \\ 2x-4x=11-8\\ \\ -2x=3\\ \\ \boxed{x=-3/2}\end{gathered}d) 2⋅(x+4)=4x+112x+8=4x+112x−4x=11−8−2x=3x=−3/2

Questão 2)

\begin{gathered}a)~4x-1=11\\ \\ 4x=11+1\\ \\ 4x=12\\ \\ x=12\div4\\ \\ \boxed{x=3}\end{gathered}a) 4x−1=114x=11+14x=12x=12÷4x=3

\begin{gathered}b)~9x+6=8x\\ \\ 9x-8x=-6\\ \\ \boxed{x=-6}\end{gathered}b) 9x+6=8x9x−8x=−6x=−6

\begin{gathered}c)~3x-1=x\\ \\ 3x-x=1\\ \\ 2x=1\\ \\ \boxed{x=1/2}\end{gathered}c) 3x−1=x3x−x=12x=1x=1/2

\begin{gathered}d)~11x+12=9x+13\\ \\ 11x-9x=13-12\\ \\ 2x=1\\ \\ \boxed{x=1/2}\end{gathered}d) 11x+12=9x+1311x−9x=13−122x=1x=1/2

\begin{gathered}e)~x-3=0\\ \\ x=0/3\\ \\ \boxed{x=0}\end{gathered}e) x−3=0x=0/3x=0

\begin{gathered}f)~x+5=11\\ \\ x=11-5\\ \\ \boxed{x=6}\end{gathered}f) x+5=11x=11−5x=6

\begin{gathered}g)~5x=4x+12\\ \\ 5x-4x=12\\ \\ \boxed{x=12}\end{gathered}g) 5x=4x+125x−4x=12x=12

\begin{gathered}h)~2x=24\\ \\ x=24\div2\\ \\ \boxed{x=12}\end{gathered}h) 2x=24x=24÷2x=12

\begin{gathered}i)~2x=-40\\ \\ x=-40\div2\\ \\ \boxed{x=-20}\end{gathered}i) 2x=−40x=−40÷2x=−20

\begin{gathered}j)~7x=1\\ \\ \boxed{x=1/7}\end{gathered}j) 7x=1x=1/7

\begin{gathered}k)~9x=5\\ \\ \boxed{x=5/9}\end{gathered}k) 9x=5x=5/9