18. Develop a formula for the solution to each system of equations. a) ax + by...

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18. Develop a formula for the solution to each system of equations. a) ax + by = c dx+ey=f b) [x, y] = [a, b] + s[c, d] [x, y] = [e, f]+t[g, h] 18. Develop a formula for the solution to each system of equations. a) ax + by = c dx+ey=f b) [x, y] = [a, b] + s[c, d] [x, y] = [e, f]+t[g, h]