2x+2y=-12 h

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Is h a variable or a measure? It could mean hours or hectares or whatever. If it's another variable after x and y we can't find out what it is, just as we can't find out what x and y are, because we only have one equation. What we can do is simplify the equation by dividing through by 2: x+y=-6h.

by Top Rated User (1.2m points)

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