1) <span>а)17+а+24-а=41</span>
<span><span> б)5y+b+10-b-10=5у</span></span>
<span><span><span> в)2 1/7+x-y+10 6/7-x+y= 13</span></span></span>
<span><span><span> <span>Г)0,29-x-а+0,71+x+a=1</span></span></span></span>
<span><span><span><span>2) <span>a) 15+(n-18)=15+n-18=n-3</span></span></span></span></span>
<span><span><span><span><span> <span>б)-(8-x)-x=-8+x-x=-8</span></span></span></span></span></span>
<span><span><span><span><span><span> <span>в)(x-4)-(x+5)=x-4-x-5=-1</span></span></span></span></span></span></span>
<span><span><span><span><span><span><span> <span>г)-(у-a-3)-(4+a)=-y+a+3-4-a=-y-1</span></span></span></span></span></span></span></span>
<span><span><span><span><span><span><span><span> <span>д)-(16-b+c)+(8+c)=-16+b-c+8+c=-8+b</span></span></span></span></span></span></span></span></span>