Could you please help me with question 2 on page 55 please? I got a>b and I don’t understand why it is a<b.

I bet you’re forgetting to distribute the 3.

    \begin{align*}(5x + 1) - (3x + 2) + 3(x + 5)\\5x+1-3x-2+3x+15\\5x-3x+3x+1-2+15\\5x+14\end{align*}

Since 5 is less than 14, when the expression is simplified to ax+b form, a<b.

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