<span><span><em>1) 6х+10=4+12</em></span></span>
6х=16-10
6х=6
х=1
<span><span>
</span><span><em> 2) 7х+25=10х+6</em></span></span>
<span><span>-3х=-19</span></span>
<span><span>х=19/3</span></span>
<span><span>
<em /></span></span>
<span><span>
</span><span><em> 3)0,4(6у-7)=0,5(3у+7)</em></span></span>
<span><span><em>2,4у-2,8=1,5у+3,5</em></span></span>
<span><span><em>0.9у=6.3</em></span></span>
<span><span><em>у=7</em></span></span>
<span><span><em /></span></span>
<span><span>
</span><span><u> 4) 0,2(5х-2)=0,3(2х-1)-0,9</u></span></span>
<span><span>х-0.4=0.6х-0.3-0.9</span></span>
<span><span>0.4х=-1,2+0,4</span></span>
<span><span>х=-0.8:0,4</span></span>
<span><span>х=-2
</span><u><em> 5) 1-5(1,5+х)=6-7,5х</em></u></span><u><em /></u>
<em><u /></em>1-7.5х-5х=6-7.5х
-5х=6-1
-5х=5
х=-1