<span><span>3.6(2y-1)-4(3y-1)-5.5(x+3)+7(x+y-5)=7,2y-3,6-12y+4-5,5x-16,5+7x+7y-35=2,2y-51,1+1,5x
-----------------------------------------------------------------------------------------------------------------------------
2.6(4-2b)-7.6(a-2)-5(6b-a+20)
=10,4-5,2b-7,6a+15,2-30b+5a-100=-74,4-35,2b-2,6a
---------------------------------------------------------------------------------------------------------------------
</span>8x-3x-6x= - 7.3
x=7,3
3x-2.5x+3+x - 1.3 = 0
1,5x=-1,7
x=-1 2/15
<span>x-4.5x+3x-4.7+5.8 = 0
0,5x=4,7-5,8
0,5x=-1,1
x=-2,2
</span>
<span>-2x +5.5x-4.1+8 - 0.5x = 0
3x=4,1-8
3x=-3,9
x=-1,3
</span></span>
<span><span>7(x-3)-4(x-5)+8= 7х-21-4х+20+8=3x+7
-6(a-b)-2(3b+2a)-23a=-6а+6b-6b-4a-23a=-33a
</span>
</span>
27/3=9 - нашли 1/5 всего пути
9*5=45 - весь путь
<span>84/x-5=17
84/х=17+5
84/х=22
х=84:22
х=7</span>