16x^2-8x+1-12x^2-10x+18x+15=4x^2-16x+16+16x
16x^2-8x-12x^2-10x+18x-4x^2+16x-16x=16-1-15
0=0
10x²-15x+2x-3=10x²+10x-3x-1
10x²-15x+2x-3-10x²-10x+3x+1=0
-13x-7x-2=0
13x+7x+2=0
20x=2
x=10
4) 6\х-8 = 8\х-6
6*(х-6) = 8*(х-8) 6х-36 = 8х-64 6х-8х= - 64+36 - 2х = - 28 х = 14
7) ху+у2 \ 15х * 3х\ х+у=
у*(х+у)\15х * 3х\х+у= у\5
7,5\5 =75\10 : 5\1 = 75\10 * 1\5 = 15\10