Question

a) x+3= -x-1
b) 1-2(x-1)= 2
c) x+10= -x+6

Answer 1

Oi

a) x + 3 = - x - 1

x + x = - 1 - 3

2x = - 4

x = - 4/2

x = - 2

b) 1 - 2(x - 1) = 2

1 - 2x + 2 = 2

- 2x = 2 - 1 - 2

- 2x = - 1 ( × por -1)

2x = 1

x = 1/2

c) x + 10 = - x + 6

x + x = 6 - 10

2x = - 4

x = - 4/2

x = - 2

Boas lições.

Answer 2

Resposta: a) x = -2; b) x = -0,5; c) x = -2

Explicação passo-a-passo:

$\mathtt{a)~x+3=-x-1}\\\\ \mathtt{~~~~x+x=-1-3}\\\\ \mathtt{~~~~2x=-4}\\\\ \mathtt{~~~~x=\dfrac{-4}{2}=-2}$

$\mathtt{b)~1-2(x-1)=2}\\\\ \mathtt{~~~~1-2x+2=2}\\\\ \mathtt{~~~~-2x=2-3}\\\\ \mathtt{~~~~-2x=-1}\\\\ \mathtt{~~~~x=\dfrac{-1}{-2}=\dfrac{1}{2}=0,5}$

$\mathtt{c)~x+10=-x+6}\\\\ \mathtt{~~~~x+x=6-10}\\\\ \mathtt{~~~~2x=-4}\\\\ \mathtt{~~~~x=\dfrac{-4}{2}=-2}$