$$\frac{13-7x}{5}=\frac{-29}{7}$$
$x = \frac{236}{49} = 4\frac{40}{49} \approx 4.816326531$
$$7\left(13-7x\right)=5\left(-29\right)$$
$$91-49x=5\left(-29\right)$$
$$91-49x=-145$$
$$-49x=-145-91$$
$$-49x=-236$$
$$x=\frac{-236}{-49}$$
$$x=\frac{236}{49}$$
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