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Solve the substitution 4x-3y=5
Y=2x-3

Sagot :

4x - 3y = 5
y = 2x - 3

     4x - 3(2x - 3) = 5
4x - 3(2x) - 3(-3) = 5
        4x - 6x + 9 = 5
              -2x + 9 = 5
                     - 9  - 9
                    -2x = -4
                     -2     -2
                       x = 2
                       y = 2x - 3
                       y = 2(2) - 3
                       y = 4 - 3
                       y = 1
                 (x, y) = (2, 1)