If X is the midpoint of WY, WX=3x-1 and WY=10x-26,find XY

Answer 1

XY = WX + WY = 3x-1 + 10x-26 = 13x-27

just add the x terms: 3x+10x = 13x

and add the constant terms -1 + (-26) = -27

put them together: 13x-27 = XY