Oksana is working to solve the equation 1 3 x = −1 4 x - 10. 1. Add 1 4 x to both sides: 1 4 x + 1 3 x = −10 2. Find a common denominator: 3 12 x + 4 12 x = −10 3. Combine the terms: 7 12 x = −10 What should she do next?