<span>-4(16+8x)+12(7-3x)=50(x+3)-(15-x)</span>
<span>-64-32х+84-36х=50х+150-15+х</span>
<span>-68х-50х-х=150-15+64-84</span>
<span>-119х=115</span>
<span>х= - 115/119</span>