Д:16-8=8
x1=(4-2под корнем2)/4
x2=(4+2 под корнем2)/4
(-1/3+1/2)*0,6-0,6:(-3/5)=-2,36
1)-1/3+½=-2/6+3/6=-5/6
2)-5/6·0,6=-3,36
3)-0,6:(-3/5)=1
4)-3,36+1=-2,36
1) 2,3,4,5,6,7,8,9,10=54
2)1=20 2=22 3=24
20+22+24=66
22*24=528
3(2x+y)-26 = 3x-2y3*2x+3y-26 = 3x-2y-26 + 3y + 6x = 3x-2y-26 + 3y + 6x = -2y + 3x3y + 6x = 26 - 2y + 3x5y + 6x = 26 + 3xx = 26 + 3x / ((5y + 6x)/x)x = 26/3 - 5y/3
15-(x-3y) = 2x+515-x+3y = 2x+515 - x + 3y = 2x+5-x + 3y = -10 + 2x-3x + 3y = -10x = -10 / ((-3x + 3y)/x)x = 10/3 + y