1.

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Answer»

we have,

x + y = 5. ----->12x - 3y = 4. ----->2

by elimination,

2x + 2y = 102x. -. 3y =4__________-5y = -6y = 6/5. -------->3

putting eq. no 3 into 1, we get ,

x + y = 5x + 6/5 = 5

after solving ,

5x + 6 = 255x = 19x = 19/5 -------->4

x = 19/4y = 6/5

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