You can put this solution on YOUR website! Given:
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Is it true or false? It will be true if the left side of the equation equals the right side.
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Begin on the left side by multiplying -2 times (5-y) to get -10 + 2y. Substitute this
into the original equation to get:
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Notice now that the left side equals the right side, term for term and sign for sign.
Therefore, the two sides are identical and the given equation is true.
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Hope this gives you some insight into how to tell if equations are true.