Mathematics
court12
5

X+y=100 4.50+20y=822.00 solve for x and y

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(2) Answers
emily97

If you have a scientific calculator then plug it into your matrix button.. As [1 4.50] [1 20] [100 822]

Kubesh678

Without a scientific calculator! x+y = 100 |*(-20) => -20x -20y = -2000                               4.50x+20y=822.00  (+) => => -15.50x = - 1178.00 => x = 1178.00/15.50 =  76 => y = 100 -76 => y = 24.

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