Question

Subtitution method ?
x + y = 3
2X +5y =12​

Answer 1

Answer:

$x + y = 3 - - - - > (1) \\ 2x + 5y = 12 - - - - - > (2) \\ now \: equation \: (1) \: is \: multiplied \: with \: 2 \: we \: get \\ (1) = > 2x + 2y = 6 - - - - - - - (3) \\ now. \: equation \: (2) - (3) \\ = > 2x + 5y - 2x - 2y = 12 - 6 \\ = > 3y = 6 \\ = > y = 2 \\ now \: putting \: this \: value \: in \: equation \: (1) \\ = > x + 2 = 3 \\ = > x = 1$

Therefore the required solution is x=1 and y=2

Step-by-step explanation:

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