Question

1) determine a raiz de cada equação.

a) 3 (x+1)+2=5+2 (x-1)

B) x-1 + x+1 = 2x+3
2 3 5

c) 1-x = x+1 + x
2 2

Answer 1

a)
3x + 3 + 2 = 5 + 2x - 2
3x + 5 = 3 + 2x
3x - 2x = 3 - 5
x = -2

b)

$\frac{x-1}{2} + \frac{x+1}{3} = \frac{2x+3}{5}$

15x - 15 + 10x + 10 -12x + 18 =
13x + 13 =

x = $\frac{-13}{13}$

x= -1

c)

$\frac{1-x}{2} = \frac{x+1+x}{2}$

$\frac{1-x}{2} = \frac{2x+1}{2}$

2 - 2x = 4x + 2
4x + 2 = 2 - 2x
6x = 2 - 2

x = $\frac{0}{6}$

x = 0