9. 6y+4=8+2y+2y Combine like terms 6y+4=8+4y Get like terms on the same side, subtract 4 from both sides to get 6y=4+4y Subtract 4y from both sides to get 2y=4 IS the answer (even though it can be simplified further, that answer isn't one of the choices so 2y=4 is the equation simplified.)
10. Step 2 was the mistake when you distribute a number you don't add (which is what they did to get 5x) you multiply to get 6x. So the correct step 2 would be 6x-8=12+2x Becuase of the distributive property.
