М=100
Р1=27
Г=31
О1=57
Ч=38
О2=29
Р2=25
Н=41
Е=33
К=5
М,О1, Н,Ч,Е,Г,О2,Р2,Р1,К
5,3х+7,8=-4,7х-7,8
5,3х+4,7х=-7,8-7,8
10х=-15,6
х=-15,6:10
х=-1,56
<span>2sin(x+π/7)=-1
sin(x+</span><span>π/7)=-1/2
x+</span>π/7=<span>(-1)ⁿ⁺¹ π/6 +πn
x=</span><span>(-1)ⁿ⁺¹ π/6 +πn- </span>π/7<span>, n∈Z</span>
19/42-5/63=(57-10)126=47/126
<span>(7/10+3/5)-(1/6+2/3)=7/15
7/10+3/5=(7+6)/10=13/10
1/6+2/3=(1+4)/6=5/6
13/10-5/6=(39-25)/30=14/30=7/15
</span>
<span>2/3-(1/20+2/9)-5/18=7/60
1/20+2/9=(9+40)/180=49/180
2/3-49/180=(120-49)/180=71/180
71/180-5/18=(71-50)/180=21/180=7/60
</span>
<span>1/3+1/4+1/5+1/6+1/7=(140+105+84+70+60)/420=459/420=1 39/420
</span>