Question

$\frac{a + b}{3} + \frac{2a}{5 \:} \: para \: a = 1 \: e \: b = - 7$
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Answer 1

$\frac{1 + 7}{3} + \frac{2 \times 1}{5}$

$\frac{8}{3} + \frac{2}{5}$

$\frac{40}{15} + \frac{6}{15}$

$\frac{46}{15} = 3.06 \: (aproximadmente)$