Here we will show you how to solve 3x = 21. In other words, we will solve for x in order to find the value of x in this equation:
3x = 21
The goal is to get x by itself on the left side. First, we divide both sides by 3 like this:
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When a numerator and denominator value are the same, then you can eliminate them by crossing them out:
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Then you are left with x by itself on the left like this:
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Finally, 21 over 3 is the same as 21 divided by 3. So, we enter that into our calculator to get the final answer:
x = 7
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