Question Video: Evaluating Algebraic Expressions after Solving One-Step Linear Equations | Nagwa Question Video: Evaluating Algebraic Expressions after Solving One-Step Linear Equations | Nagwa

Question Video: Evaluating Algebraic Expressions after Solving One-Step Linear Equations Mathematics • Sixth Year of Primary School

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If 4𝑥 = 28, what is the value of 5𝑥?

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Video Transcript

If four 𝑥 equals 28, what is the value of five times 𝑥?

Let’s begin with our equation. If we can solve for 𝑥, get a number, then we can take that number and multiply it by five and have our final answer. So let’s begin by solving for 𝑥.

So we need to divide both sides of the equation by four, taken from the left. And then on the right, 28 divided by four is seven. So if 𝑥 equals seven, then we can replace 𝑥 with seven. So now we have five times seven, which would give us a final answer of 35.

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