Solve: 5/2 x + 7/2 x = 56 - 2x
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5x/2+7x/2=56-2x
12x/2=56-2x
6x+2x=56
8x=56
x=56/8=7
12x/2=56-2x
6x+2x=56
8x=56
x=56/8=7
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Step-by-step explanation:
Pure calcium carbonate can be produced from marble, or it can be prepared by passing carbon dioxide into a solution of calcium hydroxide. In the later case calcium carbonate is derived from the mixture, forming a grade of product called "precipitated calcium carbonate,” or PCC.
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