Determine x and y so that 3x+y=81 and 81x-y=3
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Answer:x=1 y=78
Step-by-step explanation:
3x+y=81____(1)
81x-y=3____(2)
Adding equation (1) n (2), we get,
84x=84
x=1
Putting value of 'x' in equation (1), we get,
y=78
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