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what is the easiest way to solve this equation algebraically

What Is The Easiest Way To Solve This Equation Algebraically class=

Sagot :

2x + 1y = 4
2x + 3y = 9
      -2y = -5
       -2     -2
         y = 2.5
2x + 3(2.5) = 9
2x + 7.5 = 9
     - 7.5  - 7.5
         2x = 1.5
          2       2
           x = 0.75
     (x, y) = (0.75, 2.5)