Question

1-Resolva as seguintes equações: a) 3x = 15 b) 2x = 14 c) 4x=-12 d) 7x = -21 e) 13x13 f) 9x = -9 g) 25x = 0 h) 35x105 2-Determine x: a) 6x= 2x + 16 b) 2x5x+1 c) 2x + 3 = x +4 d) 5x + 7 = 4x + 10 e) 4x 10 = 2x + 2 f) 4x7 8x - 2 g) 2x + 1 = 4x - 7 h) 9x + 9 + 3x = 15 i) x + x 4 = 17 - 2x + 1 j) x + 2x + 3-5x = 4x-9 k) 5x + 6x 16 = 3x + 2x - 4​

Answer 1

Vamos là.

a) 3x = 15 , x = 5

b) 2x = 14 , x = 7

c) 4x=-12 , x = -3

d) 7x = -21 , x = -3

e) 13x = 13 , x = 1

f) 9x = -9 , x = -1

g) 25x = 0 , x = 0

h) 35x = 105 , x = 3

2-Determine x:

a) 6x = 2x + 16 , 4x = 16, x = 4

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

c) 2x + 3 = x + 4 , x = 1

d) 5x + 7 = 4x + 10 , x = 3

e) 4x - 10 = 2x + 2 , 2x = 12, x = 6

f) 4x + 7 = 8x - 2 , 4x = 9, x = 9/4

g) 2x + 1 = 4x - 7 , 2x = 8, x = 4

h) 9x + 9 + 3x = 15 , 12x = 6, x = 1/2

i) x + x + 4 = 17 - 2x + 1 , 4x = 18 - 4, x = 7/2

j) x + 2x + 3 - 5x = 4x - 9 , 6x = -12, x = -2

k) 5x + 6x +  16 = 3x + 2x - 4​, 6x = -20, x = -10/3