matrix, solve the equations using loop

Hello everyone!

I have a matrix A(3x3)

A= (2 10 15

3 5 -7

3 -2 -2 )

And Matrx B (3x1)

B = (B1

B2

B3)

Matrix C (3x1), where all values are equal to each other

C= (C1

C1

C1)

So, I need using loop, solve the equations and find the values of C1, B2 and B3. B1 is known for me, and has 125 elements. For each B1, I have to find C1, B2 and B3 respectively

Solve the equation A*B=C

Thank you in advance!