100: x = 4 and a half: four fifths anxious to solve the equation

100: x = 4 and a half: four fifths anxious to solve the equation

100: x = 4 and a half: four fifths
Four and a half x = 100 × four fifths = 80
X = 80 △ 4 and a half
X = 17 and 7 / 9

To solve the equation 8x-1,4 × 3 = 45,4

4*（8x-1/4*3）=45/4*4
32x-3=45
32x=48
x=3/2

Using formula method to solve equation (1) x ^ 2-x-1 = 0 (2) 4x ^ 2 + 8x + 1 = 0

（1）x^2-x-1=0
Here a = 1, B = - 1, C = - 1
∴x12=[-b±√(b²-4ac)]/(2a)
=(1±√5)/2
x1=(1+√5)/2 x2=(1-√5)/2
(2)4x^2+8x+1=0
Here a = 4, B = 8, C = 1
∴x12=[-b±√(b²-4ac)]/(2a)
=(-8±√48)/8
x1=(-2+√3)/2 x2=(-2-√3)/2

Solve the equation x: 15 = 54

x:15=54
x=54*15=810