I can not, for the life of me, figure out how to set the following up into a system of equations.(adsbygoogle = window.adsbygoogle || []).push({});

An object composed of x gram-mole of lead (specific gravity 11) and y gram-mole of tin(specific gravity 7) weights 82 gram-moles in air and 77 gram-moles in oil of specific gravity of 1/2. Find x and y.

Finding x and y is simple, if I could figure out the right way to set it up...:(

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# Setting up linear equations for problems dealing with specific gravity.

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