param N := 9;

var x{1..N};

minimize f:
sum {i in 4..9} x[i]^2;

subject to cons1:
x[1]+x[2]*exp(-5*x[3])+x[4] - 127 = 0;

subject to cons2:
x[1]+x[2]*exp(-3*x[3])+x[5] - 151 = 0;

subject to cons3:
x[1]+x[2]*exp(-1*x[3])+x[6] - 379 = 0;

subject to cons4:
x[1]+x[2]*exp(x[3])+x[7] - 421 = 0;

subject to cons5:
x[1]+x[2]*exp(3*x[3])+x[8] - 460 = 0;

subject to cons6:
x[1]+x[2]*exp(5*x[3])+x[9] - 426 = 0;

data;
var x:=
1	300
2	-100
3	-0.1997
4	-127
5	-151
6	379
7	421
8	460
9	426;
solve;

display x;