程序代码：

x = -100.000000
left = x+1
right = x*2
total = 0
while x<= 100.00:
    mid = left - right
    
    if left == right:
        print("x = " +x+"   "  +mid)
        total = total + 1
    x = x + 0.001
    

if total == 0:
    print("The equatioon doesn't have a solution.")
elif total == 1:
    print("The equatioon only have a solution.")
else:
    print("There are %d solutions in total.",total)

程序代码：

while x<= 100.00:
    mid = left - right
    
    if mid < 0.001 and mid > -0.001:
        print("x = " +x+"   "  +mid)
        total = total + 1
    x = x + 0.001

程序代码：

x = -100.000000

total = 0
while x<= 100.00:
    left = x+1
    right = x*2
    mid = left - right
    
    if mid < 0.001 and mid > -0.001:
        print("x = " +str(x) +"   "  +str(mid))
        total = total + 1
    x = x + 0.001
    

if total == 0:
    print("The equatioon doesn't have a solution.")
elif total == 1:
    print("The equatioon only have a solution.")
else:
    print("There are " + str(total)+" solutions in total.")