Question

pf ajudem
resolve as equacoes
a) - 3x - (x+1)= 1-2x
b) -x+ (x-2) + 1 -3x = 5
c) -(-2x + 3 ) = -x - 3 ( x - 5)

ajudem pf pf

Answer 1

a)
-3x-x-1=1-2x
-3x-x+2x=1+1
-2x=2
x=2/-2
x=-1

b)-x+x-2+1-3x=5
-x+x-3x=5+2-1
-3x=6
x=6/-3
x=-2

c)
-(-2x+3)=-x-3(x-5)
2x-3=-x-3x+15
2x+x+3x=15+3
6x=18
x=18/6
x=3

Answer 2

$a) - 3x - ( x + 1 ) = 1 - 2x \\ - 3x - x - 1 = 1 - 2x \\ - 3x - x + 2x = 1 + 1 \\ - 2x = 2 \\ 2x = - 2 \\ x = - 1 \\ \\ b) - x + ( x - 2 ) + 1 - 3x = 5 \\ - x + x - 2 + 1 - 3x = 5 \\ -3x = 5 + 2 - 1 \\- 3x = 6 \\ x =- 2 \\ \\ c) - ( - 2x + 3 ) = -x - 3 ( x - 5 ) \\ 2x - 3 = -x - 3x + 15 \\ 6x = 18 \\ x = 3$

Espero ter ajudado e bons estudos !