12×25=(12×100):4=1200:4=300
7000 – 714: 3 + 367 ∙ 2=6028
1) 714: 3=238 2) 367*2=734 3) 238+734=972 4) 7 000 - 972=6028
3*x=x+24
2*x=24 (из обеих частей уравнения вычитаем x)
x=24/2
x=12
А)
3x + π/4 = π/3 + 2πn или 3x + π/4 = 2π/3 + 2πk
3x = π/12 + 2πn 3x = 5π/12 + 2πk
x = π/36 + 2πn/3 x = 5π/36 + 2πk/3
б)
x/3 - π/4 = 2π/3 + 2πn или x/3 - π/4 = - 2π/3 + 2πk
x/3 = 11π/12 + 2πn x/3 = - 5π/12 + 2πk
x = 11π/4 + 6πn x = - 5π/4 + 6πk
д)
4x - π/3 = πn
4x = π/3 + πn
x = π/12 + πn/4
з)
sinx(sinx - √3cosx) = 0
sinx = 0 или sinx - √3cosx = 0
x= πn tgx = √3
x = π/3 + πk