Try another version of this question Write the system of equations as an augmented matrix. `{(-7b,+,7s,-,4r,=,-88),(5b,-,6s,-,2r,=,-21),(-b,+,7s,+,r,=,77):}` Box 1: Enter each element of the matrix as number (like 5, -3, 2.2)
`[(-7,7,-4,-88),(5,-6,-2,-21),(-1,7,1,77)]`