To solve this equation, you should first multiply out 5(2x + 6), which gives you 10x+30 = 8x+48. Now you can move all the x's to the left.
You can subtract 30 from 48, giving you 10x=8x+18. You can also now subtract 8x on both sides, giving you 2x=18.
Now you can divide 18 by 2, giving you x=9