SOLUTION: For a certain year, the combined revenue of Nintendo and Sony was $54 billion. If that year the revenue for Sony was $12 billion more than the revenue for Nintendo, how much was th

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Question 1152275: For a certain year, the combined revenue of Nintendo and Sony was $54 billion. If that year the revenue for Sony was $12 billion more than the revenue for Nintendo, how much was the revenue for Nintendo?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let +x+ = the revenue for Nintendo
+x+%2B+12+ = the revenue for Sony
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+x+%2B+%28+x+%2B+12+%29+=+54+
+2x+%2B+12+=+54+
+2x+=+42+
+x+=+21+
Nintendo's revenue was $21 billion
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check:
+x+=+21+
+x+%2B+12+=33+
+x+%2B+%28+x+%2B+12+%29+=+54+
+21+%2B+33+=+54+
+54+=+54+
OK