Help with this code

Question

was wondering if someone could help with this code?? when you type in a value that exceeds the 2nd limitation, the result is generated from the 2nd tier.

thank you in advance!!!

#include <iostream>
using namespace std;

int main()
{
int x;
float a, b, c, d, e, f, y1, y2, y3, y4, y5, y6;
a = 1.03;
b = 1.05;
c = 1.07;
d = 1.09;
e = 1.15;
f = 1.25;

cout << "Please enter your income: " ".\n";
cin >> x;

if (x <= 7500){
y1 = x * a;
cout<<"Your taxed value is 1: " << y1 << endl;
}

else if (7501 >= x <= 15000){
y2 = x * b;
cout<<"Your taxed value is 2: " << y2 << endl;
}

else if (15001 >= x <= 25000){
y3 = x * c;
cout<<"Your taxed value is 3: " << y3 << endl;
}

else if (25001 >= x <= 50000){
y4 = x * d;
cout<<"Your taxed value is 4: " << y4 << endl;
}

else if (50001 >= x <= 100000){
y5 = x * e;
cout<<"Your taxed value is 5: " << y5 << endl;
}

else if (x >= 100001){
y6 = x * f;
cout<<"Your taxed value is 6: " << y6 <<endl;
}

return 0;
}

Answer 1

if(constantValue/expression >= x && x <= constantValue/expression)

So it should be like this
if(7501 >= x && x <= 15000)

And similarly in all other cases.