You start with 5x+8=10. You want all your constants on one side and variables on the other. So to do that you subtract 8 from both sides, giving you 5x=2. Next you have to divide each side by 2. That gives you 5x/2, or 2.5x. You then take your next equation, 10x+16 and input x. 10(2.5)+16=41.
Your answer is 41 or 10x+16=41
