<span>(x-87)-27=36</span>
<span>х-87=36+27</span>
<span>х-87=63</span>
<span>х=63+87</span>
<span>х=150</span>
<span>проверка</span>
<span>(150-87)-27=36</span>
<span>63-27=36</span>
<span>36=36</span>
(х-87)-27-36
x-87-27=36
x=36+87+27
x=150
Ответ: с₁ = -1; с₂ = 1