Question

hallar ¨x¨
a)2x+1=4x b)2x=1/16 c)3x+1=9x-2

Answer 1

2x + 1 = 4x
 1 = 4x - 2x  si pasamos un factor al otro lado cambia de signo 
 1 = 2x
 1/2 = x

2x = 1/16
X = 1 / (16*2)
x = 1 / 32

3x + 1 = 9x - 2
1 + 2 = 9x - 3x
3 = 6x
3 / 6  = X
1/2 = x

Answer 2

a) 2x+1=4x 
2x-4x = -1
-2x = -1
x = -1/-2

b) 2x=1/16
32x/16 = 1/16
x = 1/32

c)3x+1=9x-2
3x-9x = -2-1
-6x = -3
x = -3/-6