Question

Resultado com calculo.
a) 5x - 8 -( 3x + 9 ) = - ( x - 2 )

b) 8 ( x - 3 ) + 2 ( 5 - x ) = - x

c) 2 ( - 2x + 3 ) - 5 ( 2 - x ) = 3 ( 2x + 3 )

Answer 1

$a)5x-8-(3x+9)=-(x-2)\\5x-8-3x-9=-x+2\\5x-3x+x=2+8+9\\3x=19\\x= \frac{19}{3}{\to} 6,33...$

$b) 8 ( x - 3 ) + 2 ( 5 - x ) = - x\\8x-24+10-2x=-x\\8x-2x+x=24-10\\7x=14\\x= \frac{14}{7} =2$

$c)2 ( - 2x + 3 ) - 5 ( 2 - x ) = 3 ( 2x + 3 )\\-4x+6-10+5x=6x+9\\-4x+5x-6x=9-6+10\\-5x=13\\5x=-13\\x= \frac{-13}{5}{\to}-2,6$

Espero ter ajudado xD

Answer 2

a) 5x - 8 - ( 3x + 9 ) = - ( x - 2 )
5x - 8 - 3x - 9 = - x + 2
5x - 3x + x = 2 + 8 + 9
3x = 19
x = 19/3

b) 8 ( x - 3 ) + 2 ( 5 - x ) = - x
8x - 24 + 10 - 2x = - x
8x - 2x + x = 24 - 10
7x = 14
x = 14/7
x = 2/1
x = 2

c) 2 ( - 2x + 3 ) - 5 ( 2 - x ) = 3 ( 2x + 3 )
- 4x + 6 - 10 + 5x = 6x + 9
- 4x + 5x - 6x = 9 - 6 + 10
- 5x = 13 . ( - 1 )
5x = - 13
x = - 13/5

Espero ter ajudado !! :)