Question

Resolva as equações em R

A) 3x - 6 = -x +26

B) 4x +3= -2x +21

C) 3 (2x - 9) +3 (-x +4) = 4x +18

D) 5x +3 (x - 4 ) = 7x +9​

Answer 1

3x + x = 26 + 6
4x = 32
X = 8

4x + 2x = 21 -3
6x = 18
X= 3

6x - 27 -3x +12 = 4x + 18
6x -3x -4x = 18 + 27 - 12
-x = 33 (-1)
X = -33

5x +3x -12 = 7x + 9
5x + 3x -7x = 9 + 12
X = 21

Answer 2

Resposta:

Explicação passo-a-passo:

Resolvendo:

a)

$3x-6=-x+26\\3x+x=26+6\\4x=32\\x=8$

S = { x ∈ R | x = 8 }

b)

$4x+3=-2x+21\\4x+2x=21-3\\6x=18\\x=3$

S = { x ∈ R | x = 3 }

c)

$3 (2x - 9) +3 (-x +4) = 4x +18\\6x-27-3x+12=4x+18\\3x-15=4x+18\\3x-4x=18+15\\-x=33\\x=-33$

S = { x ∈ R | x = - 33 }

d)

$5x +3 (x - 4 ) = 7x +9\\5x+3x-12=7x+9\\8x-12=7x+9\\8x-7x=9+12\\x=21$

S = { x ∈ R | x = 21 }

Espero ter ajudado!

Desculpe qualquer erro.