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14 March, 09:15

Solve by Substitution

2x + y = 3

4x + 4y = 8

+3
Answers (1)
  1. 14 March, 10:29
    0
    2x + y = 3 = > y = 3-2x

    then

    4x+4 (3-2x) = 8

    4x+12-8x = 8

    -4x = - 4

    x=1

    y=3-2*1 = 1
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