if 2v+w=13 and v+3w=19,what is the value of w?

if 2v+w=13 and v+3w=19,what is the value of w?
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1 Answer

Double the second equation: 2v+6w=38. Subtract the first equation: 5w=25, so w=5. Now substitute this in either equation to get v=4.

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