Answer:
b = -5.2/2.4
Explanation:
1.3(8-b)+3.7b=5.2
10.4 - 1.3b + 3.7b = 5.2
10.4 + 2.4b = 5.2
2.4b = 5.2 - 10.4
2.4b = -5.2
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