Помогите решить уравнения пж
3x(2x-1)-6x(7+x)=90
15x(3+2x)=3x(x+1)-30
5x(12x-7)-4x(15x-11)=30+29x
3x(2x-1)-6x(7+x)=90
15x(3+2x)=3x(x+1)-30
5x(12x-7)-4x(15x-11)=30+29x
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Answers & Comments
-45x=90
x=-2
2)27x^2+42x+30=0
x=-7/9
3)60x^2-35x-60x^2+44x=30+19x
-10x=30
x+-3