Lesson: Number of Solutions to a System

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@1.14 Can we just leave one equation multiplied by 2, do we have to multiply both the equation by 2 to give them equality.
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When you multiply/divide both sides of an equation by some value, you are creating an EQUIVALENT equation. For example, the equation x + y = 3 is EQUIVALENT to the equation 2x + 2y = 6

So, to answer your question, you need not multiply both EQUATIONS by 2.

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