1)
9 + 2 (3 - 4x) = 2x - 3
9 + 6 - 8x = 2x -3
10x = 18
x = 1,8
2)
<span>9 - 2 (3 - 4х) = -2х + 1</span>
9 - 6 + 8x = -2x + 1
10x = -2
x = -0,2
<span>(1/7xy)⁴*(-49axy)²*(-2ay)⁶</span>= (1/2401x^4y^4)*(2401a^2x^2y^2)*(64a^6y^6) = 64a^8x^6y^12
3x+1)²=3x+1
(3x+1)²-(3x+1)=0
(3x+1)(3x+1-1)=0
3x+1=0 3x=0
3x=-1 x=0
x=-1/3
<span>Ответ: х=0, х=-1/3</span>