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What is the value of the expression below when \( x=5 \) ? \[ 4 x-8 \]

Ask by Sullivan Hall. in the United States
Feb 22,2025

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The value of the expression is 12.

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To find the value of the expression \( 4x - 8 \) when \( x = 5 \), simply substitute 5 for \( x \): \[ 4(5) - 8 = 20 - 8 = 12. \] Therefore, the value of the expression is 12. Now, imagining how math has been part of our storytelling since forever! Ancient Greeks used simple algebraic expressions to solve day-to-day problems, with mathematicians like Diophantus laying the groundwork for future equations. In today's world, algebra isn't just for textbooks; it's used in fields like finance for calculating profits or in technology for coding algorithms. Knowing how to manipulate expressions helps us make sense of everything from budgeting to developing video games!

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