$$\frac{-2\times13+2\times5}{7-4+i}$$
$-\frac{24}{5}+\frac{8}{5}i=-4.8+1.6i$
$$\frac{-26+10}{7-4+i}$$
$$\frac{-16}{7-4+i}$$
$$\frac{-16}{3+i}$$
$$\frac{-16\left(3-i\right)}{\left(3+i\right)\left(3-i\right)}$$
$$\frac{-16\left(3-i\right)}{3^{2}-i^{2}}$$
$$\frac{-16\left(3-i\right)}{10}$$
$$\frac{-16\times 3-16\left(-i\right)}{10}$$
$$\frac{-48+16i}{10}$$
$$-\frac{24}{5}+\frac{8}{5}i$$
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$-\frac{24}{5} = -4\frac{4}{5} = -4.8$
$$Re(\frac{-26+10}{7-4+i})$$
$$Re(\frac{-16}{7-4+i})$$
$$Re(\frac{-16}{3+i})$$
$$Re(\frac{-16\left(3-i\right)}{\left(3+i\right)\left(3-i\right)})$$
$$Re(\frac{-16\left(3-i\right)}{3^{2}-i^{2}})$$
$$Re(\frac{-16\left(3-i\right)}{10})$$
$$Re(\frac{-16\times 3-16\left(-i\right)}{10})$$
$$Re(\frac{-48+16i}{10})$$
$$Re(-\frac{24}{5}+\frac{8}{5}i)$$
$$-\frac{24}{5}$$
