<span>а) 3(х+2)-5(2-х)=4(2х-1)</span>
<span>3x+6 - 10 + 2x = 8x - 4</span>
<span>5x-4=8x-4</span>
<span>3x=0</span>
<span>x=0</span>
<span><span>б) 4(х+1)-6(х-1)=2(5-х)</span></span>
<span><span>4x + 4 - 6x + 6 = 10 - 2x</span></span>
<span><span>-2x + 10 = 10 -2x</span></span>
<span><span>нет корней</span></span>
<span><span><span>в) 5(1+х) -(3х-4)=2х+9</span></span></span>
<span><span><span>5 + 5x - 3x + 4 = 2x + 9</span></span></span>
<span><span><span>2x + 9 = 2x +9</span></span></span>
<span><span><span>нет корней</span></span></span>
<span><span><span><span>г) 4х-1=(2х+5)-(3х-2)</span></span></span></span>
<span><span><span><span> 4x - 1 = 2x + 5 - 3x + 2</span></span></span></span>
<span><span><span><span>4x - 1 = -x + 7</span></span></span></span>
<span><span><span><span>5x = 8 </span></span></span></span>
<span><span><span><span>x=8/5</span></span></span></span>