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Math·Algebra·Linear equations in two variables

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A piece of a metal alloy called delta metal has a total mass of 200.0 grams. The equation $c+z+5.2=200.0$ relates the mass of copper $c$, in grams, and the mass of zinc $z$, in grams, in this piece of metal. If this piece of metal contains 110.0 grams of copper, how many grams of zinc does it contain?

A

90.0

B

194.8

C

110.0

D

84.8