Question

Resolva: a)3(2x-3)+2(x+1)=3x+18

B)2x+3(x-5)=4x+9

c)2(x+1)-3(2x-5)6x-3

d)3x-5=13

E)3x+5=2

f)x-(2x-1)=23

g)2x-(X-1)=5-(x-3) Urgente

Answer 1

a)

 

$<var> 3.2x-9+2x+2=3x+18\\8x-7=3x+18\\8x-3x=18+7\\5x=25\\x=5</var>$

 

b)

 

$<var>2x+3x-15=4x+9\\5x-15=4x+9\\5x-4x=9+15\\x=24</var>$

 

c)

 

$<var>2x+2-6x+15=6x-3\\-4x+17=6x-3\\17+3=6x+4x\\20=10x\\x=2</var>$

 

d)

 

$<var>3x=13+5\\ 3x=18\\ x=6</var>$

 

e)

 

$<var>3x=2-5\\ 3x=-3\\ x=-3/3\\ x=-1</var>$

 

f)

 

$<var>x-2x+1=23\\ -x=23-1\\ (-x=22)^{.(-1)}\\ x=-22</var>$

 

g)

 

$<var>g)2x-(X-1)=5-(x-3) 2x-x+1=5-x+3\\ x+1=8-x\\ x+x=8-1\\ 2x=7\\ x=7/2\ ou\ 3,5</var>$

 

Quaisquer duvida me avise no chat.