(10) \( 4 x+3 x \leq 0 \)
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To solve the inequality \( 4x + 3x \leq 0 \), first, combine like terms to get \( 7x \leq 0 \). Dividing both sides by 7 gives us \( x \leq 0 \). This means that \( x \) can be any value less than or equal to zero, including negative numbers and zero itself. In real-world terms, think of constraints like weight limits or temperature ranges. If you're designing a structure that can’t hold weight beyond a certain limit, this inequality represents all the allowable weights that keep your structure safe. If \( x \) represented weight, then any weight of zero or less could be regarded as safe, which might imply a lightweight structure or none at all!