<span>4х+3(х-7)=5</span>
<span>4x+3x-21-5=0</span>
<span>7x-26=0</span>
<span>7x=26</span>
<span>x=26/7</span>
<span><span>8=3(х-4)-х</span></span>
<span><span>8=3x-12-x</span></span>
<span><span>3x-12-x-8=0</span></span>
<span><span>2x-20=0</span></span>
<span><span>2x=20</span></span>
<span><span>x=10</span></span>
<span><span><span>2х-(7+х)=2</span></span></span>
<span><span><span>2x-7-x-2=0</span></span></span>
<span><span><span>x-9=0</span></span></span>
<span><span><span>x=9</span></span></span>