Question

$x + y = 9 : 2x + 5y = 81 then \: find \: x \: and \: y$
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Answer 1

Answer:

x + y = 9

x = 9 - y........ (1)

2x + 5y = 81

2(9 - y) + 5y = 81

18 - 2y + 5y = 81

3y = 81 - 18

y = 63/3

y = 21

x = 9 - 21 = - 12

Therefore x = - 12 and y = 21

Pls follow......