$$11x+5x-1=65x-36.$$
$x=\frac{5}{7}\approx 0.714285714$
$$16x-1=65x-36$$
$$16x-1-65x=-36$$
$$-49x-1=-36$$
$$-49x=-36+1$$
$$-49x=-35$$
$$x=\frac{-35}{-49}$$
$$x=\frac{5}{7}$$
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