Question

8 . (b + 3) - 2b + 6 . (4 - 2b) = 15
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Answer 1

Resposta:

8 . (b + 3) - 2b + 6 . (4 - 2b) = 15

$8b + 24 - 2b + 24 - 12b = 15 \\ 6b + 48 - 12b = 15 \\ - 6b = 15 - 48 \\ - 6b = - 33 \times ( - 1) \\ 6b = 33 \\ b = \frac{33}{6} \div 3 \\ b = \frac{11}{2}$