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Algebra Difficulty 2.2 Junior Find the answer
If x=2 and v=3x, what is the value of (2v−5)−(2x−5)?
A number or a short expression. Spacing and $ signs are ignored.
Solution
Since v=3x and x=2, then v=3⋅2=6. Therefore, (2v−5)−(2x−5)=(2⋅6−5)−(2⋅2−5)=7−(−1)=8.
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