Как решить задачу?

<span>69+7х=2х+59</span>

<span>7х-2х=59-69</span>

<span>5х=-10</span>

<span>х=-10:5</span>

<span>х=-2</span>

<span>проверка:</span>

<span>69+7*(-2)=2*(-2)+59</span>

<span>55=55</span>