Solve the systems by the addition method: a) {x-2y = -4 2x + y = 7 b) {2x + y = -1 x-2y = -4
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a) Apply the Cramer’s rule to solve the following system of linear equations:
2x+3y=7
x+2y=3
b) Solve the above system using the inverse of the matrix of this system.
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