te an equivalent expression for \[ 4 x+9+3 y+3 x+4 \]

Let's break it down! You can combine like terms in the expression \( 4x + 9 + 3y + 3x + 4 \). When you add the coefficients of \( x \), you get \( 4x + 3x = 7x \). For the constants, \( 9 + 4 = 13 \). So, the equivalent expression is \( 7x + 3y + 13 \). Simplifying expressions is a fundamental skill in algebra. It’s like tidying up your room—you're just organizing everything to find what you need quickly! Just remember to group similar terms to make the process easier. If you ever lose track, jot down what you have for each variable and constant, and combine them step by step!