Question

. Date Page find x+y 12x+25y=108;25x+12y=77.​

Answer 1

Answer:

$12x + 25y = 108$

$25x + 12y = 77$

$(12x + 25y = 108) \times 25 \\ - (25x + 12y = 77) \times 12$

$300x + 625y = 2700 \\ - 300x - 144y = - 924$

$481y = 1776$

$y = 3.69(aprox)$

$x = 1.31(approx)$

$x + y = (3.69 + 1.31) = 5$

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