Solution equation: (30-2x) (22-2x) = 165
660-60x-44x+4x²=165
4x²-104x+495=0
4x²-104x+675=180
(2x-26)²=180
(x-13)²=45
x-13=±3√5
x=13±3√5
Solve the equation (30-2x) (20-2x) = 200
(30-2x)(20-2x)=200
It unfolds well
600-100x+4x^2=200
4x^2-100x+400=0
x^2-25x+100=0
(x-20)(x-5)=0
x=25,x=5
2X + 30% x = 14.95
2x+30%x=14.95
2.3x=14.95
x=14.95÷2.3
x=6.5
How to solve 2x * (x + 2x / 3) = 480
2x*x*(1+2/3)=480
x*x=144
x=+-12