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Sagot :
Answer:
7.9
Step-by-step explanation:
[tex]2.25(a + 1.3) = 20.7 \\ \\ \implies a+ 1.3 = \frac{20.7}{2.25} \\ \\ \implies a+ 1.3 = 9.2 \\ \\ \implies a= 9.2 - 1.3 \\ \\ \implies a= 7. 9\\ \\ [/tex]
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