How can i input this on MATLAB?

How can i input this on MATLAB?

Express v = (3, 7, -4) in R3 as a linear combination of the vectors

u1=(1, 2, 3); u2 =(2, 3, 7); u3 =(3, 5, 6)

We seek scalars x, y, z such that v = xu1 + yu2 + zu3

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Answer 1

[KSSV]

b = [3, 7, -4]' ; 
u1=[1, 2, 3]; 
u2 =[2, 3, 7]; 
u3 =[3, 5, 6] ;

A = [u1' u2' u3'] ; 
x = A\b ;
% check 
[A*x b]

ans = 3×2

3.0000 3.0000 7.0000 7.0000 -4.0000 -4.0000