140+200=340
Х=518-340
Х=178
X^2+5x=0
x(x+5)=0
x=0
x=-5
Ответ:-5
1/4 - 1/3 M = 4 1/4 - 3M
3M - 1/3M = 4 1/4 - 1/4
2 2/3M = 4
M = 4 : 2 2/3
M = 4/1 : 8/3
M = 3/2
M = 1,5
283040/10 = 28304
283040
20
83
80
30
30
40
40
0
28304
9
254736
Cos62sin58+sin62sin(90-58)=
cos62sin58+sin62cos58=sin (62+58)=sin120=
корень из трёх на 2. v3/2