Пожалуйста номер 878

<span>1.  -6х-13=-7х-14</span>

<span>-6х + 7х = -14 + 13</span>

<span>х = -1.</span><span />

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<span>2. <span>6х-7(3х-5)-2(4х-7)=3</span></span>

<span><span>   6х - 21х + 35 - 8х + 14 = 3</span></span>

<span><span>  -23х = -46</span></span>

<span><span>х = 2</span></span>