3х+2,7=0
<span>3х=-2,7 </span>
<span>х=-2,7/3 </span>
<span>х=-0,9 </span>
Alfa+beta+gama=180°
alfa=beta
gama=3.alfa
alfa+alfa+3alfa=180°
5alfa=180°
alfa=36°, beta=36°, gama=3.36°=108°
<span>1) (5a³b²)⁴ * 20a²b = 625a¹²b⁸ * 20a²b = 12500a¹⁴b⁹
2) m⁹n² * n⁵m³ = m¹²n⁷</span>
Х(8-20х)=0
х=0 или 20х=8|:20; х=2/5