Answer:
x = 7.1
Explanation:
6.3 + 5.6 + 8.4 + x = 27.4
20.3 + x = 27.4
20.3 - 20.3 + x = 27.4 - 20.3
x = 27.4 - 20.3
6.3 + 5.6 + 8.4 + 7.1 = 27.4
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