45*4/9=20(пирожков с вишней)
45-20=25(пирожков с другой начинкой)
416:52*17+368=504
1)416:52=8
2)8*17=136
3)136+368=504
1000-587+16*27=845
1)16*27=432
2)1000-587=413
3)413+432=845
а) ....=12 13/37+11 11/17+13 25/37+14 6/17=(12 13/37+13 25/37)+(11 11/17+14 6/17)=25 38/37+25 17/17=26 1/37+26=42 1/37
б) .....=(25 13/27+21 5/9)+(12 4/19+13 15/19)=(25 13/27+21 15/27)+25 19/19=46 28/27+26=47 1/27+26=73 1/27
1.(x-6)²=(x-3)²
x²-12x+36=x²-6x+9
x²-12x+36-<span>x</span>²<span>+6x-9=0
-6x+27=0
-6x= -27
x=4.5
2. </span><span>-2x</span>²<span> - 2x + 5= -x</span>²<span> - x - (1+x</span>²<span>)
</span><span>-2x</span>²<span> - 2x + 5+x</span>²<span>+x+1+x</span>²<span>=0
</span>-x+6=0
x=6