



 
Hi there. The answer does not seem right. If I read properly what you wrote, you are saying that If we multiply both sides by 21, we get this: 7 ( x + 1) + 3 ( x + 2 ) = 2 (21) Now we can distribute the factors and solve for x: 7x + 7 + 3x + 6 = 42 That's a different answer than your book gives. So either I am misunderstanding the initial equation you sent, or the book is wrong. If it was right, we could plug in x = 10/21 (the answer the book gives) and work out the left hand side of the equation and see if it makes 2 (the right hand side): (10/21 + 1) / 3 + (10/21 + 2) / 7 Here's proof that x = 29/10 works though: (29/10 + 1) / 3 + (29/10 + 2) / 7 Cheers.  


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