1/2x + 1/4 - 1/10x = 1/5
reduciendo términos semejantes:
1/2x - 1/10x = 1/5 - 1/4
factor comun
1/(2x)(1 - 1/5) = 1/20(4 - 5)
1/(2x)(5/5 - 1/5) = - 1/20
1/(2x)(4/5) = - 1/20
4/(10x) = - 1/20
2/(5x) = - 1/20
2.20 = - 1(5x)
40 = - 5x
x = 40/(-5)
= - 8 x = - 8
