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3 * 15 = 45

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15 = 45 / 3

or

3 = 45 / 15

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Q: How do you write an equation for 45?
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It is an equation because it is telling us that one thing is equal to another. We solve for the value of a like this:2a + 45 = 5aIf we subtract 2a from both sides of the equation (from both sides in order to keep things equal) we get:45 = 5a - 2aWe can now simplify the right side of the equation by calculating 5a - 2a to get:45 = 3aIt reads better to write this as 3a = 45.Now if we divide both sides of the equation by 3 we will end up with "a" on one side:a = 45/3a = 15.


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