Answer:
But if we look alternately, we see that 5 is a fourth of 20: 5 : 7 = 20 : 28. And 7 is a fourth of 28. If we cannot solve a proportion directly, then we can solve it alternately.
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Answer:
But if we look alternately, we see that 5 is a fourth of 20: 5 : 7 = 20 : 28. And 7 is a fourth of 28. If we cannot solve a proportion directly, then we can solve it alternately.