Think about the process  what should be the first step to starting the proof? prove that x equals = 1 1 for the equation 3 3(x plus + 3 3) minus − 21 21 equals = negative 10 −10 plus +x. statements reasons 1. 3 3(x plus + 3 3) minus − 21 21 equals = negative 10 −10 plus +x 1. ? 2. ? equals = negative 10 −10 plus +x 2. distributive property 3. 3 3x plus + 9 9 minus − 21 21 minus −x equals = negative 10 −10 3. ? 4. 2 x minus 12 2x−12 equals = negative 10 −10 4. ? 5. 2 2x equals = ? 5. addition addition property of equality 6. x equals = 1 1 6. ? what should be the first step to starting the proof?