Solve equation 2 (x-3) (x + 5) = square of X + square of X (x-20) + (X-2) (x + 3)

Solve equation 2 (x-3) (x + 5) = square of X + square of X (x-20) + (X-2) (x + 3)

After resolving, we get: the third power of X - 23x + 24 = 0, x = 1

5 (x + 3) = 20 solution equation
5（X+3）=20
solve equations
Writing process

5（x+3)=20
5x +15=20
5x=5
x=1

The solution of equation (x + 4) (X-5) = x2-20 is ()
A. x=0B. x=-4C. x=5D. x=40

(x + 4) (X-5) = x2-20, x2-5x + 4x-20 = x2-20, - x = 0, x = 0

Solving equation 8 + 60% x = 9 50% x + 80% x = 1

8+60%x=9
60%x=1
x=1÷60%
x=5/3
50%x+80%x=1
(50%+80%)x=1
130%x=1
x=10/13