Question

Determine o conjunto verdade da equação
(A) 5 (x+2) = 2 (x-1)
(B) -2 (x+4) = 4 (x-1)
(C) -3 (x-1) = 8 (x+4)
(D) -1 (x+2) = 3 (x-3)
(E) 7 (x-1) = 2 (x+9)
(F) 3 (x+2) = x+3
(G) 10 (x-1) = 2 (x-1)
(H) 7 (x+6) = 3 (x+8)

Answer 1

Boa tarde Sabrinna

a)  

5x + 10 = 2x - 2
3x = -12
x = -4
S = (-4)

b)

-2x - 8 = 4x - 4
6x = -4
x = -2/3
S = (-2/3)

c)

-3x + 3 = 8x + 32
11x = -29
x = -29/11
S = (-29/11)

d)

-x - 2 = 3x - 9 
4x = 7
x = 7/4
S = (7/4)

e)

7x - 7 = 2x + 18
5x = 25
x = 5
S = (5)

f)

3x + 6 = x + 3
2x = -3
x = -3/2
S = (-3/2)

g)

10x - 10 = 2x - 2
8x = 8
x = 1
S = (1) 

h)

7x + 42 = 3x + 24
4x = -18
x = -9/2
S = (-9/2)