Answered

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substitution

y=2x+5
x+2y=15

Sagot :

Panoyin
y = 2x + 5
x + 2y = 15

    x + 2(2x + 5) = 15
x + 2(2x) + 2(5) = 15
      x + 4x + 10 = 15
            5x + 10 = 15
                  - 10 - 10
                     5x = 5
                      5     5
                       x = 1
y = 2(1) + 5
y = 2 + 5
y = 7
(x, y) = (1, 7)
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