It is known that the value of the discriminant of the root of the equation (x-1) * (2x + 1) = 4x-k-1 is 25. Solve this equation

It is known that the value of the discriminant of the root of the equation (x-1) * (2x + 1) = 4x-k-1 is 25. Solve this equation

(X-1)*(2X+1)=4X-K-1
2x^2-x-1=4x-k-1
2x^2-5x+k=0
Discriminant = 25-8k = 25
So k = 0
The equation is 2x ^ 2-5x = 0
x(2x-5)=0
So x = 0 or x = 5 / 2

It is known that the value of the discriminant of the root of equation (x-1) (2x + 1) = 4x-k-1 is 25

After simplifying the above formula, we get: 2x ^ 2-5x + k = 0;
The value of the discriminant is 25
B ^ 2-4ac = 25
After simplification: 25-8k = 25
So: k = 0

5x + 3 = 21-4x help me solve this equation

5x+3=21-4x
5x+4x=21-3
9x=18
x=2

How to solve the two equations (6-4) x = 48 + 8, 4x + 2 (11-x) = 42

(6-4)x=48+8
2x=56
x=56/2
x=28
4x+2（11-x）=42
4x+22-2x=42
4x-2x=42-22
2x=20
x=10

How to solve the equation of 0.75x = x-20?

0.75x=x-20
0.25x=20
x=8

x/45=1+(x+30)/60

x/45=1+x/60+1/2
x/45-x/60=3/2
(60x-45x)/45*60=3/2
15x/45*60=3/2
x/3*60=3/2
x/180=3/2
x=180*3/2
x=270

How to solve the equation of 0.75x + 0.50 (16-x) = 10.50

0.75x+0.50(16-x)=10.50
0.75x+8-0.5x=10.50
0.25x=10.5-8
0.25x=2.5
x=2.5÷0.25
x=10

Solving the equation 3 ^ (x + 2) - 3 ^ (2-x) = 80 about X

3^(x+2)-3^(2-x)=80
9*3^x-9/3^x-80=0
9*(3^x)^2-80*(3^x)-9=0
(9*3^x+1)*(3^x-9)=0
3^x-9=0
3^x=9
x=2

How to solve the equation of X-60 = 80% x?

X-60=80%X
x-0.8x=60
0.2x=60
x=300

How to solve the equation 60 * (2 + x) = 80 * x

60*(2+x)=80*x
120+60x=80x
20x=120
x=6