1. The problem statement, all variables and given/known data Suppose the angles on an inclined plane are 60*(left-hand side) and 20* (right-hand side). If the left-hand mass is 2.1 kg, what should the right-hand mass be so that it accelerates downslope at 0.64 m/s/s? 2. Relevant equations F=ma 3. The attempt at a solution a=.64 Ml (left-side) = 2.1kg Mr (right-side) = ? θl = 60* θr = 20* Ml -> F = Mla -> T - Mlgsinθl = Mla Mr -> F = Mra -> Mrgsinθr - T = Mra I understand that since acceleration is the same then Mla + Mra = (Ml + Mr)a I also know that T = Mla + Mlgsinθl So I tried to sub in for T -> Mrgsinθr - Mla + Mlgsinθl = Mra but this doesn't make any sense to me. No matter how I look at it I can't seem to isolate Mr by itself. This is causing me considerable frustration.