Question

if 99x plus 101y= 499,101yplus 99y==510 then x =​

Answer 1

Answer:

3

Step-by-step explanation:

1st Step:

99x + 101y = 499

+ 101x + 99y = 501

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200x + 200y = 1000

200( x + y = 5 )

2nd Step :

99x + 101y = 499

- 101x + 99y = 501

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-2x + 2y = -2

-2( x - y = 1 )

3rd Step

x. + y. = 5

+ x. - y. = 1

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2x. + 0. = 6

4th Step :

2x + 0 = 6

2x = 6

x = 6/2

x = 3