answer: x=3 how to do it: 1. Distribute the 3 to the 6x+3. This will result in “18x+9” 2. Now you have 18x+9=63 3. Subtract 9 from both sides to isolate the variable. 4. Now you have 18x=54 5. Divide both sides by 18. Now you have x=3. Hope this helps.