Question 56658
1/4x-1/8x=3-1/16x

work the left side
1/4x-1/8x=1/8x
so
1/8x=3-1/16x

change subtracting to adding the negative
1/8x=3+-1/16x

add 1/16x to both sides(same as subtracting negative)
1/8x+1/16x=3/16x
so
3/16x=3

divide both sides by 3/16
x=16

This is my first online help so let me know if somting isn't clear. Hope it helps.